中小学教育资源及组卷应用平台
专题04 U5条件状语从句100题（学生版）
学校:___________姓名：___________班级：___________考号：___________
牛津上海版期中好题精刷系列资料，助力期中冲刺！
向满分说YES！
一、单项选择
1．If it is sunny tomorrow, my parents ________ me to the park.
A．take B．took C．will take D．have taken
2．—Will your parents attend your graduation ceremony next week
—If they_________ free, they will be pleased to come.
A．were B．are C．will be D．have been
3．—How is Mike getting on with his lessons
—He will pass the exam _______ he studies harder.
A．if B．unless C．after D．when
4．We’ll be at the risk of catching the virus ________ we get a vaccine (疫苗).
A．unless B．if C．when D．whether
5．I will be very happy if I ________ to give a speech at tomorrow’s meeting.
A．invite B．will be invited C．was inviting D．am invited
6．________ schools put Labor (劳动) education into practice, students will be more independent.
A．While B．Unless C．If D．Although
7．He won’t have our sports meeting if it ________ tomorrow.
A．rains B．will rain C．rained D．rain
8．________ we work hard, we’ll make our dreams come true easily.
A．If B．Unless C．Though D．Before
9．— I’m sorry for being late for the party, James.
—________.
A．What a pity! B．How come C．You are welcome! D．It’s no big deal!
10．Amy is my best friend. I hope our ___________ can last forever.
A．memory B．promise C．result D．friendship
11．You’ll fall behind ________ you put your heart into your study.
A．unless B．since C．when D．because
12．—I wonder if he ________ us in the dancing tonight.
—I believe if he ________ his homework, he will join us.
A．will join; will finish B．will join; finishes C．joins; finishes D．joins; will finish
13．You’re not allowed to drive a car on the road ________ you get a driver’s license.
A．unless B．if C．since D．although
14．Scientists and doctors will never give up doing research ________ they find the truth of the disease in the end.
A．since B．though C．when D．unless
15．Your dream will come true ________ you put your thoughts into action.
A．before B．unless C．although D．if
16．________ you can use your dictionary, you will learn English better.
A．If B．Unless C．Though D．Before
17．—It is impossible to finish the difficult task in such a short time on my own ________ both of us work together.
—No problem. Let’s start!
A．if B．but C．because D．unless
18．You will not get higher marks ________ you study harder.
A．if B．unless C．since D．though
19．You can’t finish it ________ you have confidence in yourself.
A．unless B．because C．when D．after
20．Jimmy goes to the park to do exercise every morning ________ the bad weather stops him.
A．if B．when C．since D．unless
21．—Too much work has made me tired these days, Mrs. Gao.
—That’s true. But a small tree won’t grow into a big one ________ it experiences lots of winds and rains.
A．if B．because C．when D．unless
22．Kate wants to lose weight, but she can’t make it ________ she stops eating snacks after every meal.
A．if B．unless C．after D．because
23．I won’t go to her party ________ I have finished all my homework.
A．before B．if C．unless D．until
24．He won’t go to the party unless his good friend Bob ________.
A．invites B．is inviting C．is invited D．will be invited
25．________ you read it, you can’t imagine how moving the story is.
A．Unless B．Because C．Although D．When
26．If I ________ to go abroad, I’ll go to Britain.
A．allow B．am allowed C．was allowed D．will allow
27．Do you know if he ________ tomorrow If he ________, I’ll invite him to my home.
A．come; comes B．will come; comes C．comes; comes D．will come; come
28．—What are you doing now Would you like to join us in the game
—Sorry, I’m so busy now. If I ________ time, I ________ join you.
A．had; would B．have; would C．have; will D．had; will
29．You are not supposed to enter the teachers’ office ________ you are allowed to.
A．unless B．until C．because D．before
30．We will never achieve our dreams ________we study really hard.
A．if B．unless C．when D．after
31．Mr. Green will go on a picnic this Sunday _________ the weather is bad.
A．while B．unless C．because D．when
32．Tom will never give up smoking ________ he really realizes how harmful it is to his health.
A．because B．when C．if D．unless
33．________ we continue to pull together, we will achieve our goal at last.
A．Even though B．So that C．As soon as D．As long as
34．________ we work together, nothing will be difficult.
A．As well as B．As long as C．As much as D．As tall as
35．The traffic on Sha’nan Road will become worse ________ everyone follows the traffic rules.
A．if B．since C．unless D．after
36．You can’t make greater progress ________ you work harder.
A．if B．unless C．after D．because
37．—You will fail the exam __________ you work hard.
—OK, I’ll do my best.
A．and B．but C．if D．unless
38．The senior high school entrance examination is very important. You will lose the opportunity ________ you make an effort.
A．though B．once C．unless D．if
39．—The air pollution is terrible.
—It will be worse ________ we take action to protect the environment.
A．if B．unless C．though D．until
40．Restaurants must stop offering free plastic bags in Beijing ________ customers ask for them.
A．since B．unless C．because D．so
41．—Do you know if Mr Wang ________ to the party this evening
—I don’t know. But if he ________, the children will be very happy.
A．comes; came B．will come; comes C．comes; comes D．will come; will come
42．—What do you think of Hardy
—Oh, I will like him ________ he speaks ________ a polite way.
A．if; in B．unless; in C．if; at D．unless; at
43．Tom will not get the special gift unless he ________ all the tasks.
A．finish B．will finish C．finished D．finishes
44．ChatGPT can finish many different tasks ________ you “chat” with it.
A．if B．unless C．before D．but
45．________ you keep living in the past, you can’t fully live in the present.
A．Until B．Unless C．Though D．If
46．________ all of us can learn to love, everything around us will be a wonder.
A．Because B．If C．Before D．Although
47．________ you stick to it, you will succeed.
A．Although B．So C．Whatever D．As long as
48．—What should we do when the earthquake happens
—Don’t worry. You will be quite safe ________ you follow my instructions.
A．even though B．as long as C．unless D．until
49．---What a great basketball player Spub Web is!
---He showed us that we could realize our dreams __________ we gave them up halfway．
A．unless B．if C．since D．though
50．In summer, food will go bad quickly________ we put it into a fridge.
A．if B．unless C．as soon as D．when
51．Practice speaking every day ________ you want to improve your spoken English.
A．if B．though C．until D．unless
52．Many hands make light work. Nothing will be achieved ________ all members work together.
A．if B．until C．unless D．although
53．You may easily lose your way in the rain forest ________ you don’t have a map or a guide.
A．if B．unless C．though D．until
54．I ___________ a dress for my mother unless I can think of a better idea for a present.
A．buy B．bought C．will buy D．have bought
55．—You’d better find some ideas for a short trip in a travel guide.
— ___________. Thank you.
A．I don’t think so B．You can come together
C．It is too far away D．That’s a good idea
56．—Don’t throw your rubbish here! The dustbin is just over there.
—________.
A．Sorry, I won’t B．Not at all C．You are right D．Better not
57．It’s important for students to develop the ________ of learning and thinking on their own.
A．ability B．progress C．memory D．direction
58．—I have got ready for the coming test.
—Well done! Success always comes after a good ________.
A．spirit B．goal C．list D．plan
59．We can discover basic ________ about history in the Natural History Museum.
A．facts B．methods C．service D．advice
60．Exercising before going to bed may make it hard to ________ and sleep.
A．come down B．calm down C．break down D．fall down
61．________ you want to watch television, I will turn it off now.
A．Since B．As C．Until D．Unless
62．You should report your trip to the school ________ you travel outside the city.
A．unless B．until C．if D．while
63．I wonder if he ________ time tomorrow；if he ________ free, I’ll invite him to give a speech in our school.
A．will have; is B．has; will be C．will; have D．has; is
64．If you take the train, you ________ in Beijing in five hours.
A．arrive B．will arrive C．arrived D．has arrived
65．If you ________ nervous before exams, you can take a deep breath and calm yourself down.
A．is getting B．will get C．get D．got
66．— Do you believe what he said
— ________ there are more details to prove that, I will not accept it.
A．Unless B．If C．Although D．Since
67．—Many school children in China are nearsighted（近视的）.
—It will be a serious problem ________ we do something to improve the situation.
A．while B．if C．though D．unless
68．—Why did Mrs. Lane speak in such a loud voice
—Because the students at the back of the classroom couldn’t hear her ________ she didn’t raise her voice.
A．if B．until C．though D．unless
69．You can’t make progress in English learning ________ you work harder.
A．if B．unless C．so D．until
70．—Labor (劳动) education is important for students’ development.
—Yes. ________ schools put it into practice, students will be more independent and helpful.
A．While B．Unless C．If D．Though
71．— I’m in no doubt _________ he has paid for the tickets.
— Of course not! ________ I have a bad memory.
A．that; If B．whether; If C．that; Unless D．whether; Unless
72．—Paul is badly hurt on the playground. Let’s help him up.
—Don’t move him ________ you know some first-aid knowledge.
A．unless B．if C．until D．although
73．—Why are you dropping white stones along the way
—__________ I do, we’ll be lost.
A．Until B．As soon as C．Unless D．Although
74．_________ most people get news online, printed newspapers won’t disappear in a hurry.
A．Because B．Since C．Though D．Unless
75．If I ________ time tomorrow, I will clean the room.
A．have B．will have C．had D．am having
76．The local government advises people ________ to other places ________ it is not necessary during the pandemic.
A．travel; unless B．to not travel; if C．not to travel; unless D．not to travel; if
77．You won’t fully experience the culture of a foreign country ________ you go there in person.
A．because B．unless C．as soon as D．as long as
78．—Can you guess if Mike ________ swimming this afternoon
—Sure. I think he will go with us if he ________ free.
A．will go; is B．will go; will be C．goes; is D．goes; will be
79．—David wants to know if ________ a picnic tomorrow.
—Yes, but if it ________, we’ll visit the museum instead.
A．you have; will rain B．you will have; will rain
C．will you; have rains D．you will have; rains
80．Learning to write is learning to think. You don’t know things clearly ________ you write them down.
A．whether B．after C．since D．unless
81．You will not get the special gift ________ you finish all the tasks.
A．after B．because C．while D．unless
82．I won’t go to the movies this afternoon ________ I’m free.
A．or B．unless C．because D．than
83．Our classroom won’t be clean ________ we clean it every day.
A．after B．while C．unless D．because
84．________ the weather improves, we’ll have to cancel the outdoor picnic.
A．Unless B．If C．Because D．When
85．I don’t know if he ________ tomorrow. If he ________, I will call you.
A．comes; comes B．comes; will come
C．will come; will come D．will come; comes
86．You will never know how much progress you can make _________ you try your best.
A．unless B．although C．if D．so
87．—It is said that an alien（外星人）came to our village yesterday.
—I won’t believe it ________ I see it with my own eyes.
A．unless B．because C．after D．though
88．— Betty, do you know if Tony ________ the photo competition
— He will, if he ________ his work on Australia.
A．takes part in; finishes B．takes part in; will finish
C．will take part in; finishes D．will take part in; will finish
89．We can achieve success ________ we don’t give up trying.
A．even though B．as long as C．as if D．as soon as
90．—I’m afraid e-books might be bad for our eyes.
—________ we put them to good use, they will be helpful.
A．So that B．Even though C．As soon as D．As long as
91．Because of COVID-19（新冠）, don’t leave Changchun _________ you have to this winter.
A．if B．unless C．when D．after
92．—Mrs. Li, will you be angry ________ your students follow the rules in class
—A little. But I will stop them in a friendly way.
A．if B．unless C．until D．as soon as
93．The air pollution ________ worse unless we ________ action to protect the environment.
A．is；will take B．will be；will take C．will be；take D．won’t be；take
94．— I want to know if there ________ a sports meeting next month.
— If it ________, what kind of sport will you take part in
A．will be, comes B．will be, will come C．is, comes D．is, will come
95．We can go to foreign countries ________ the COVID-19 virus is ________ control.
A．unless; under B．if; out of C．unless; out of D．if; under
96．一Mum, will you take me to the park tomorrow
一If it _______ rainy.
A．won’t B．doesn’t C．isn’t D．won’t be
97．I don’t know if Nancy ________ to the mountains tomorrow. If she doesn’t, ________.
A．goes; neither I will B．will go; neither will I C．goes; neither I do D．will go; neither do I
98．I don’t know if he __________ tomorrow. If he __________, I will call you.
A．will come, comes B．comes, will come
C．comes, comes D．will come, will come
99．Life on the Earth will become uneasy _________ population growth is under control.
A．although B．because C．unless D．when
100．Your dream will come true _________ you give it up half way. Hang in there!
A．if B．until C．unless D．because
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21世纪教育网(www.21cnjy.com)中小学教育资源及组卷应用平台
专题04 U5条件状语从句100题（详解版）
学校:___________姓名：___________班级：___________考号：___________
牛津上海版期中好题精刷系列资料，助力期中冲刺！
向满分说YES！
一、单项选择
1．If it is sunny tomorrow, my parents ________ me to the park.
A．take B．took C．will take D．have taken
2．—Will your parents attend your graduation ceremony next week
—If they_________ free, they will be pleased to come.
A．were B．are C．will be D．have been
3．—How is Mike getting on with his lessons
—He will pass the exam _______ he studies harder.
A．if B．unless C．after D．when
4．We’ll be at the risk of catching the virus ________ we get a vaccine (疫苗).
A．unless B．if C．when D．whether
5．I will be very happy if I ________ to give a speech at tomorrow’s meeting.
A．invite B．will be invited C．was inviting D．am invited
6．________ schools put Labor (劳动) education into practice, students will be more independent.
A．While B．Unless C．If D．Although
7．He won’t have our sports meeting if it ________ tomorrow.
A．rains B．will rain C．rained D．rain
8．________ we work hard, we’ll make our dreams come true easily.
A．If B．Unless C．Though D．Before
9．— I’m sorry for being late for the party, James.
—________.
A．What a pity! B．How come C．You are welcome! D．It’s no big deal!
10．Amy is my best friend. I hope our ___________ can last forever.
A．memory B．promise C．result D．friendship
11．You’ll fall behind ________ you put your heart into your study.
A．unless B．since C．when D．because
12．—I wonder if he ________ us in the dancing tonight.
—I believe if he ________ his homework, he will join us.
A．will join; will finish B．will join; finishes C．joins; finishes D．joins; will finish
13．You’re not allowed to drive a car on the road ________ you get a driver’s license.
A．unless B．if C．since D．although
14．Scientists and doctors will never give up doing research ________ they find the truth of the disease in the end.
A．since B．though C．when D．unless
15．Your dream will come true ________ you put your thoughts into action.
A．before B．unless C．although D．if
16．________ you can use your dictionary, you will learn English better.
A．If B．Unless C．Though D．Before
17．—It is impossible to finish the difficult task in such a short time on my own ________ both of us work together.
—No problem. Let’s start!
A．if B．but C．because D．unless
18．You will not get higher marks ________ you study harder.
A．if B．unless C．since D．though
19．You can’t finish it ________ you have confidence in yourself.
A．unless B．because C．when D．after
20．Jimmy goes to the park to do exercise every morning ________ the bad weather stops him.
A．if B．when C．since D．unless
21．—Too much work has made me tired these days, Mrs. Gao.
—That’s true. But a small tree won’t grow into a big one ________ it experiences lots of winds and rains.
A．if B．because C．when D．unless
22．Kate wants to lose weight, but she can’t make it ________ she stops eating snacks after every meal.
A．if B．unless C．after D．because
23．I won’t go to her party ________ I have finished all my homework.
A．before B．if C．unless D．until
24．He won’t go to the party unless his good friend Bob ________.
A．invites B．is inviting C．is invited D．will be invited
25．________ you read it, you can’t imagine how moving the story is.
A．Unless B．Because C．Although D．When
26．If I ________ to go abroad, I’ll go to Britain.
A．allow B．am allowed C．was allowed D．will allow
27．Do you know if he ________ tomorrow If he ________, I’ll invite him to my home.
A．come; comes B．will come; comes C．comes; comes D．will come; come
28．—What are you doing now Would you like to join us in the game
—Sorry, I’m so busy now. If I ________ time, I ________ join you.
A．had; would B．have; would C．have; will D．had; will
29．You are not supposed to enter the teachers’ office ________ you are allowed to.
A．unless B．until C．because D．before
30．We will never achieve our dreams ________we study really hard.
A．if B．unless C．when D．after
31．Mr. Green will go on a picnic this Sunday _________ the weather is bad.
A．while B．unless C．because D．when
32．Tom will never give up smoking ________ he really realizes how harmful it is to his health.
A．because B．when C．if D．unless
33．________ we continue to pull together, we will achieve our goal at last.
A．Even though B．So that C．As soon as D．As long as
34．________ we work together, nothing will be difficult.
A．As well as B．As long as C．As much as D．As tall as
35．The traffic on Sha’nan Road will become worse ________ everyone follows the traffic rules.
A．if B．since C．unless D．after
36．You can’t make greater progress ________ you work harder.
A．if B．unless C．after D．because
37．—You will fail the exam __________ you work hard.
—OK, I’ll do my best.
A．and B．but C．if D．unless
38．The senior high school entrance examination is very important. You will lose the opportunity ________ you make an effort.
A．though B．once C．unless D．if
39．—The air pollution is terrible.
—It will be worse ________ we take action to protect the environment.
A．if B．unless C．though D．until
40．Restaurants must stop offering free plastic bags in Beijing ________ customers ask for them.
A．since B．unless C．because D．so
41．—Do you know if Mr Wang ________ to the party this evening
—I don’t know. But if he ________, the children will be very happy.
A．comes; came B．will come; comes C．comes; comes D．will come; will come
42．—What do you think of Hardy
—Oh, I will like him ________ he speaks ________ a polite way.
A．if; in B．unless; in C．if; at D．unless; at
43．Tom will not get the special gift unless he ________ all the tasks.
A．finish B．will finish C．finished D．finishes
44．ChatGPT can finish many different tasks ________ you “chat” with it.
A．if B．unless C．before D．but
45．________ you keep living in the past, you can’t fully live in the present.
A．Until B．Unless C．Though D．If
46．________ all of us can learn to love, everything around us will be a wonder.
A．Because B．If C．Before D．Although
47．________ you stick to it, you will succeed.
A．Although B．So C．Whatever D．As long as
48．—What should we do when the earthquake happens
—Don’t worry. You will be quite safe ________ you follow my instructions.
A．even though B．as long as C．unless D．until
49．---What a great basketball player Spub Web is!
---He showed us that we could realize our dreams __________ we gave them up halfway．
A．unless B．if C．since D．though
50．In summer, food will go bad quickly________ we put it into a fridge.
A．if B．unless C．as soon as D．when
51．Practice speaking every day ________ you want to improve your spoken English.
A．if B．though C．until D．unless
52．Many hands make light work. Nothing will be achieved ________ all members work together.
A．if B．until C．unless D．although
53．You may easily lose your way in the rain forest ________ you don’t have a map or a guide.
A．if B．unless C．though D．until
54．I ___________ a dress for my mother unless I can think of a better idea for a present.
A．buy B．bought C．will buy D．have bought
55．—You’d better find some ideas for a short trip in a travel guide.
— ___________. Thank you.
A．I don’t think so B．You can come together
C．It is too far away D．That’s a good idea
56．—Don’t throw your rubbish here! The dustbin is just over there.
—________.
A．Sorry, I won’t B．Not at all C．You are right D．Better not
57．It’s important for students to develop the ________ of learning and thinking on their own.
A．ability B．progress C．memory D．direction
58．—I have got ready for the coming test.
—Well done! Success always comes after a good ________.
A．spirit B．goal C．list D．plan
59．We can discover basic ________ about history in the Natural History Museum.
A．facts B．methods C．service D．advice
60．Exercising before going to bed may make it hard to ________ and sleep.
A．come down B．calm down C．break down D．fall down
61．________ you want to watch television, I will turn it off now.
A．Since B．As C．Until D．Unless
62．You should report your trip to the school ________ you travel outside the city.
A．unless B．until C．if D．while
63．I wonder if he ________ time tomorrow；if he ________ free, I’ll invite him to give a speech in our school.
A．will have; is B．has; will be C．will; have D．has; is
64．If you take the train, you ________ in Beijing in five hours.
A．arrive B．will arrive C．arrived D．has arrived
65．If you ________ nervous before exams, you can take a deep breath and calm yourself down.
A．is getting B．will get C．get D．got
66．— Do you believe what he said
— ________ there are more details to prove that, I will not accept it.
A．Unless B．If C．Although D．Since
67．—Many school children in China are nearsighted（近视的）.
—It will be a serious problem ________ we do something to improve the situation.
A．while B．if C．though D．unless
68．—Why did Mrs. Lane speak in such a loud voice
—Because the students at the back of the classroom couldn’t hear her ________ she didn’t raise her voice.
A．if B．until C．though D．unless
69．You can’t make progress in English learning ________ you work harder.
A．if B．unless C．so D．until
70．—Labor (劳动) education is important for students’ development.
—Yes. ________ schools put it into practice, students will be more independent and helpful.
A．While B．Unless C．If D．Though
71．— I’m in no doubt _________ he has paid for the tickets.
— Of course not! ________ I have a bad memory.
A．that; If B．whether; If C．that; Unless D．whether; Unless
72．—Paul is badly hurt on the playground. Let’s help him up.
—Don’t move him ________ you know some first-aid knowledge.
A．unless B．if C．until D．although
73．—Why are you dropping white stones along the way
—__________ I do, we’ll be lost.
A．Until B．As soon as C．Unless D．Although
74．_________ most people get news online, printed newspapers won’t disappear in a hurry.
A．Because B．Since C．Though D．Unless
75．If I ________ time tomorrow, I will clean the room.
A．have B．will have C．had D．am having
76．The local government advises people ________ to other places ________ it is not necessary during the pandemic.
A．travel; unless B．to not travel; if C．not to travel; unless D．not to travel; if
77．You won’t fully experience the culture of a foreign country ________ you go there in person.
A．because B．unless C．as soon as D．as long as
78．—Can you guess if Mike ________ swimming this afternoon
—Sure. I think he will go with us if he ________ free.
A．will go; is B．will go; will be C．goes; is D．goes; will be
79．—David wants to know if ________ a picnic tomorrow.
—Yes, but if it ________, we’ll visit the museum instead.
A．you have; will rain B．you will have; will rain
C．will you; have rains D．you will have; rains
80．Learning to write is learning to think. You don’t know things clearly ________ you write them down.
A．whether B．after C．since D．unless
81．You will not get the special gift ________ you finish all the tasks.
A．after B．because C．while D．unless
82．I won’t go to the movies this afternoon ________ I’m free.
A．or B．unless C．because D．than
83．Our classroom won’t be clean ________ we clean it every day.
A．after B．while C．unless D．because
84．________ the weather improves, we’ll have to cancel the outdoor picnic.
A．Unless B．If C．Because D．When
85．I don’t know if he ________ tomorrow. If he ________, I will call you.
A．comes; comes B．comes; will come
C．will come; will come D．will come; comes
86．You will never know how much progress you can make _________ you try your best.
A．unless B．although C．if D．so
87．—It is said that an alien（外星人）came to our village yesterday.
—I won’t believe it ________ I see it with my own eyes.
A．unless B．because C．after D．though
88．— Betty, do you know if Tony ________ the photo competition
— He will, if he ________ his work on Australia.
A．takes part in; finishes B．takes part in; will finish
C．will take part in; finishes D．will take part in; will finish
89．We can achieve success ________ we don’t give up trying.
A．even though B．as long as C．as if D．as soon as
90．—I’m afraid e-books might be bad for our eyes.
—________ we put them to good use, they will be helpful.
A．So that B．Even though C．As soon as D．As long as
91．Because of COVID-19（新冠）, don’t leave Changchun _________ you have to this winter.
A．if B．unless C．when D．after
92．—Mrs. Li, will you be angry ________ your students follow the rules in class
—A little. But I will stop them in a friendly way.
A．if B．unless C．until D．as soon as
93．The air pollution ________ worse unless we ________ action to protect the environment.
A．is；will take B．will be；will take C．will be；take D．won’t be；take
94．— I want to know if there ________ a sports meeting next month.
— If it ________, what kind of sport will you take part in
A．will be, comes B．will be, will come C．is, comes D．is, will come
95．We can go to foreign countries ________ the COVID-19 virus is ________ control.
A．unless; under B．if; out of C．unless; out of D．if; under
96．一Mum, will you take me to the park tomorrow
一If it _______ rainy.
A．won’t B．doesn’t C．isn’t D．won’t be
97．I don’t know if Nancy ________ to the mountains tomorrow. If she doesn’t, ________.
A．goes; neither I will B．will go; neither will I C．goes; neither I do D．will go; neither do I
98．I don’t know if he __________ tomorrow. If he __________, I will call you.
A．will come, comes B．comes, will come
C．comes, comes D．will come, will come
99．Life on the Earth will become uneasy _________ population growth is under control.
A．although B．because C．unless D．when
100．Your dream will come true _________ you give it up half way. Hang in there!
A．if B．until C．unless D．because
参考答案：
1．C
【详解】句意：如果明天天气晴朗，我父母会带我去公园。
考查动词时态。本句是“If”引导的条件状语从句，遵循“主将从现”的原则，即主句需要用一般将来时。故选C。
2．B
【详解】句意：——下周你父母会参加你的毕业典礼吗？——如果他们有空，他们会很高兴来。
考查条件状语从句。根据句意可以，本句为if引导的条件状语从句，时态为主将从现，主语they是第三人称复数，谓语动词用复数are。故选B。
3．A
【详解】句意：——迈克的功课进展如何？——如果他更努力地学习，他会通过考试的。
考查条件状语从句。if如果；unless除非；after在……之后；when当……时。根据“he studies harder”可知，考试通过的条件是更努力地学习，应用if引导条件状语从句，故选A。
4．A
【详解】句意：除非我们接种疫苗，否则我们将面临感染病毒的风险。
考查从属连词辨析。unless除非；if如果；when当……时；whether是否。根据“we get a vaccine”可知是除非接种疫苗，否则就会有感染的风险，故选A。
5．D
【详解】句意：如果我被邀请在明天的会议上发言，我将非常高兴。
考查if引导的条件状语从句。根据“I will be very happy if I…to give a speech at tomorrow’s meeting.”可知，此处是if引导的条件状语从句，应该遵循“主将从现”的原则，即if引导的从句部分用一般现在时，故排除B、C项。此处表示“我被邀请”，应该是被动语态。故选D。
6．C
【详解】句意：如果学校实行劳动教育，学生将更加独立。
考查连词辨析。While然而；Unless除非；If如果；Although尽管。根据“... schools put Labor (劳动) education into practice, students will be more independent.”可知，学生更独立的条件是学校实行劳动教育，此处应由if引导条件状语从句。故选C。
7．A
【详解】句意：如果明天下雨，他就不能参加我们的运动会了。
考查动词时态。本句是if引导的条件状语从句，时态上遵循“主将从现”原则。所以从句用一般现在时，主语是it，谓语动词用三单形式，故选A。
8．A
【详解】句意：如果我们努力工作，我们会很容易实现我们的梦想。
考查从属连词辨析。If如果；Unless除非；Though尽管；Before在……之前。 根据“…we work hard, we’ll make our dreams come true easily.”可知，此处指如果努力工作，会很容易实现梦想，应用if引导条件状语从句，表示“如果”。故选A。
9．D
【详解】句意：——James，很抱歉我聚会迟到了。——没什么大不了的。
考查情景交际。What a pity真遗憾；How come 为什么；You’re welcome不用谢；It’s no big deal没什么大不了。根据“ I’m sorry for being late for the party”表达歉意；可知此处是回应对方的歉意。故选D。
10．D
【详解】句意：艾米是我最好的朋友。我希望我们的友谊能天长地久。
考查名词词义。memory记忆力；promise许诺；result结果；friendship友谊。根据前句Amy is my best friend.艾米是我最好的朋友，可知应是希望我们的友谊能天长地久。故选D。
11．A
【详解】句意：除非你用心学习，否则你会落后的。
考查连词辨析。unless除非；since自从；when当……时候；because因为。根据“You’ll fall behind...you put your heart into your study.”可知，此处是指除非用心学习，否则会落后。用unless引导条件状语从句。故选A。
12．B
【详解】句意：——我想知道他今晚是否加入我们的舞蹈。——我相信如果他完成了他的作业，他会加入我们的。
考查状语从句和宾语从句。第一处if意为“是否”，后接宾语从句，根据tonight意为“今晚”提示用will join；第二处if意为“如果”，引导条件状语从句，应遵循主将从现的原则，主句用一般将来时，从句用一般现在时表将来，所以用finishes。故选B。
13．A
【详解】句意：除非你有驾驶执照，否则你不被允许在路上开车。
考查从属连词辨析。unless除非；if如果；since自从；although虽然，尽管。根据“You’re not allowed to drive a car on the road …you get a driver’s license.”可知，此处空后为条件，表示“除非你有驾驶执照，否则就不能开车上路”，使用unless“除非”，故选A。
14．D
【详解】句意：科学家和医生永远不会放弃研究，除非他们最终找到疾病的真相。
考查连词辨析。since自从，引导时间状语从句；though虽然，引导让步状语从句；when当……时候，引导时间状语从句；unless除非，引导条件状语从句。分析句子“Scientists and doctors will never give up doing research...they find the truth of the disease in the end.”可知，这是一个条件状语从句，“找到疾病的真相”是“科学家和医生放弃研究”的条件，因此使用unless引导条件状语从句。故选D。
15．D
【详解】句意：如果你把你的想法付诸行动，你的梦想就会实现。
考查连词。before在……之前；unless除非；although虽然；if如果。根据“把想法付诸行动”和“梦想会实现”可知，两者之间表示条件假设，因此该句应用if引导条件状语从句。故选D。
16．A
【详解】句意：如果你能使用字典，你会学英语学得更好。
考查从属连词辨析。If如果；Unless除非；Though虽然；Before在……之前。根据“…you can use your dictionary, you will learn English better.”可知，此处空后为条件，且为肯定条件，使用if引导条件状语从句，故选A。
17．D
【详解】句意：——除非我们两个一起努力，否则我一个人不可能在这么短的时间内完成这项艰巨的任务。——没问题。让我们开始吧！
考查连词辨析。if如果；but但是；because因为；unless除非。根据“It is impossible to finish the difficult task in such a short time on my own...both of us work together.”可知，前后句是条件关系，除非两个人一起努力，否则不能完成任务。故选D。
18．B
【详解】句意：除非你更加努力学习，否则你不会得到更高的分数。
考查连词。if如果；unless除非；since既然；though虽然。根据空格前后句之间的关系可知，此处指的是“除非努力学习，否则得不到高分”，应用unless引导条件状语从句，故选B。
19．A
【详解】句意：除非你对自己有信心，否则你无法完成它。
考查从属连词辨析。unless除非；because因为；when当……时；after在……之后。“you have confidence in yourself”是“You can’t finish it”的否定条件，用unless引导条件状语从句，故选A。
20．D
【详解】句意：吉米每天早上去公园锻炼身体，除非恶劣的天气阻止他。
考查条件状语从句。if如果；when当……的时候；since自从；unless除非。结合句意可知，没有恶劣的天气是吉米每天早上去公园锻炼身体的前提条件，即除非恶劣的天气阻止他。故选D。
21．D
【详解】句意：——高老师，这些天作业太多了，我都累了。——确实。但是一棵小树不会成长为一棵大树，除非它经历了很多风雨。
考查连词辨析。if如果，引导条件状语从句；because因为，引导原因状语从句；when当……时，引导时间状语从句；unless除非，引导条件状语从句。分析句子可知，此处表示“但是一棵小树不会成长为一棵大树，除非它经历了很多风雨”的含义，强调“除非”，用于句中引导条件状语从句。故选D。
22．B
【详解】句意：凯特想减肥，但除非她每顿饭后都停止吃零食，否则她无法减肥。
考查连词辨析。if如果；unless除非；after在……之后；because因为。根据“she can’t make it ... she stops eating snacks after every meal”可知，除非凯特停止饭后吃零食，否则她无法做到减肥，此处用unless引导条件状语从句。故选B。
23．C
【详解】句意：除非我完成所有的作业，否则我不会去参加她的聚会。
考查从属连词辨析。before在……之前；if如果；unless除非；until直到。“I have finished all my homework”是“I won’t go to her party”的否定条件，用unless引导条件状语从句。故选C。
24．C
【详解】句意：除非他的好朋友鲍勃被邀请，否则他不会去参加聚会。
考查时态及语态。句子是unless引导的条件状语从句，应用一般现在时，从句中主语his good friend Bob与谓语invite之间为被动关系，此处应用be done，故选C。
25．A
【详解】句意：如果你没有阅读它，你就无法想象这个故事有多感人。
考查从属连词辨析。Unless除非，如果不；Because因为；Although虽然，即便；When什么时候。根据“you read it, you can’t imagine how moving the story is”可知，如果你没有阅读它，你就无法想象这个故事有多感人，应用unless来引导条件状语从句。故选A。
26．B
【详解】句意：如果我被允许出国，我将去英国。
考查一般现在时的被动语态。本句含有if引导的条件状语从句，需满足“主将从现”原则，从句用一般现在时，排除CD选项；主语是动作的承受者，所以用一般现在时的被动语态，故选B。
27．B
【详解】句意：你知道他明天会来吗？如果他来，我就邀请他来我家。
考查动词时态。第一空是if引导的宾语从句，根据时间状语“tomorrow”可知，用一般将来时，其结构是will+动词原形，排除AC；第二空是if引导的条件状语从句，遵循主句用一般将来时，从句用一般现在时态，主语是he，谓语动词变第三人称单数。故选B。
28．C
【详解】句意：——你现在在干什么？你想和我们一起玩游戏吗？——对不起，我现在很忙。如果我有时间，我会加入你。
考查if引导的条件状语从句。本句是if引导的条件状语从句，遵循“主将从现”原则，故选C。
29．A
【详解】句意：除非被允许，否则你不应该进入老师的办公室。
考查连词辨析。unless除非；until直到；because因为；before在……之前。根据“You are not supposed to enter the teachers’ office …you are allowed to”可知，除非被允许进入老师的办公室，否则就不应该进入，故选A。
30．B
【详解】句意：除非我们努力学习，否则我们永远不会实现我们的梦想。
考查连词辨析。if如果；unless除非；when当……时； after……之后。根据“We will never achieve our dreams … we study really hard.”可知，此处表示除非努力学习否则不能实现梦想，应用unless引导条件状语从句。故选B。
31．B
【详解】句意：除非天气不好，格林先生这个星期天要去野餐。
考查连词辨析。while当……时；unless除非；because因为；when当……时。“the weather is bad”是去野餐的否定条件，此处用unless引导条件状语从句。故选B。
32．D
【详解】句意：除非汤姆真正意识到吸烟对他的健康有多么有害，否则他永远不会戒烟。
考查连词辨析。because因为；when当……的时候；if如果；unless除非。“he really realizes how harmful it is to his health”是“Tom will never give up smoking”的否定条件，因此用unless引导条件状语从句，故选D。
33．D
【详解】句意：只要我们继续团结一致， 我们最终会实现目标。
考查从属连词辨析。Even though 即使；So that 以便；As soon as 尽快；As long as 只要。根据句意可知，实现目标的条件是我们继续团结一致，即从句是主句的条件，as long as，表示”只要”，引导条件状语从句。故选D。
34．B
【详解】句意：只要我们一起努力，没有什么是困难的。
考查连词辨析。As well as也、和……一样；As long as只要；As much as差不多；As tall as和……一样高。根据语境“我们一起努力”以及“没什么困难”可知，此处是as long as引导条件状语从句。故选B。
35．C
【详解】句意：除非每个人都遵守交通规则，否则沙南街的交通会变得更糟。
考查从属连词辨析。if如果；since自从；unless除非；after在……之后。根据“everyone follows the traffic rules”可知，除非每个人都遵守交通规则，否则这条路的交通会变得更糟。因此应用unless来引导条件状语从句。故选C。
36．B
【详解】句意：除非你更加努力，否则你无法取得更大的进步。
考查连词辨析。if如果；unless除非，如果不；after在……以后；bcause因为。根据前后句的语境可知，如果你不努力，你就不会取得更大的进步，应用unless引导条件状语从句。故选B。
37．D
【详解】句意：——除非你努力学习，否则你考试会不及格。——好的。我会尽力的。
考查连词辨析。and和；but但是；if如果；unless除非。“you work hard”是考试会不及格的否定条件，用unless引导条件状语从句。故选D。
38．C
【详解】句意：中考是非常重要的。如果你不努力，就会失去这个机会。
考查连词辨析。though尽管；once一旦；unless除非，如果不；if如果。根据“You will lose the opportunity...you make an effort.”可知后句是前句的否定条件，应用unless引导条件状语从句，故选C。
39．B
【详解】句意：——空气污染很可怕。——如果我们不采取措施保护环境，空气污染会更严重。
考查从属连词辨析。if如果；unless如果不，除非；though虽然，尽管；until直到。根据“we take action to protect the environment”可知，如果我们不采取措施保护环境，空气污染会更严重，因此应用unless引导条件状语从句。故选B。
40．B
【详解】句意：北京的餐厅必须停止提供免费塑料袋，除非顾客要求。
考查连词辨析。since自从；unless除非；because因为；so所以。根据“Restaurants must stop offering free plastic bags in Beijing”及“customers ask for them”可知，除非顾客主动要，否则北京的餐厅不可以提供免费塑料袋，后文表条件，所以空格处填引导条件状语从句的连词unless。故选B。
41．B
【详解】句意：——你知道王先生今晚是否来参加晚会吗？——我不知道。但是如果他来了，孩子们会很高兴的。
考查if的用法和对应时态。根据“Do you know if…”可知，此处if表示“是否”，引导宾语从句，根据“this evening”可知，句子此处是一般将来时，故第一空填will come；根据“But if he…, the children will be very happy.”可知此处是if引导的条件状语从句，应该遵循“主将从现”的原则，即从句部分为一般现在时，从句主语是he，动词用其三单形式。故选B。
42．A
【详解】句意：——你觉得Hardy怎么样？——噢，如果他说话有礼貌的话，我会喜欢他的。
考查连词辨析和介词辨析。if如果；unless除非；in以，按照；at在。in...way表示“以……方式”，可排除CD选项；“说话有礼貌”是“喜欢他的”肯定条件，需用if引导条件状语从句。故选A。
43．D
【详解】句意：除非汤姆完成所有的任务，否则他不会得到这份特别的礼物。
考查条件状语从句。根据句意，unless引导条件状语从句，主句用一般将来时，从句用一般现在时，即“主将从现”，从句主语是he，为第三人称单数，谓语动词用单三形式，故选D。
44．A
【详解】句意：如果你与ChatGPT“聊天”，它可以完成许多不同的任务。
考查连词辨析。if如果；unless除非；before在……之前；but但是。根据根据“ChatGPT can finish many different tasks...you ‘chat’ with it.”可知后句是前句的肯定条件，应用if引导条件状语从句，故选A。
45．D
【详解】句意：如果你继续活在过去，你就不能彻底活在当下。
考查连词辨析。Until直到……为止，引导时间状语从句；Unless除非，引导条件状语从句，含有否定意义；Though虽然，尽管，引导让步状语从句；If如果，引导条件状语从句。根据“you keep living in the past”可知，此处的从句表示肯定假设。故选D。
46．B
【详解】句意：如果我们都可以学习去爱，身边的一切都将会是一个奇迹。
考查连词辨析。Because“因为”；If“如果”；Before“在之前”；Although“尽管”。“学会爱”是“一切成为奇迹”的条件，应用if引导条件状语从句。故选B。
47．D
【详解】句意：只要你坚持到底，你就会成功。
考查连词辨析。Although尽管；So所以；Whatever无论什么；As long as只要。根据“you stick to it, you will succeed.”可知，此处描述了一个条件，做了就可以成功，应用条件状语从句的连词。故选D。
48．B
【详解】句意：——地震发生时我们该怎么办？——别担心。只要你听从我的指示，你就会很安全。
考查连词辨析。even though即使；as long as只要；unless除非；until直到。“you follow my instructions”是“You will be quite safe”的条件，用as long as引导条件状语从句。故选B。
49．A
【详解】句意：——斯伯特·韦伯是多棒的篮球运动员啊！——他向我们展示了如果我们不中途放弃梦想，我们就能实现梦想。
考查连词辨析。unless除非，如果不；if如果；since自从……以来，既然；D. though虽然，即使。根据上文“斯伯特·韦伯是多棒的篮球运动员啊！”可知“他向我们展示了如果我们不中途放弃梦想，我们就能实现梦想。”故选A。
50．B
【详解】句意：夏天，食物很快就会变质，除非我们把它放进冰箱里。
考查条件状语从句。if如果；unless除非；as soon as一……就……；when当……时候。根据句意，前文表示“在夏天，食物很快就会变质”，后文表示“我们把食物要放入冰箱”，可知，后文表示条件，而且是否定的条件，所以空格处用引导条件状语从句的连词unless，故答案选B。
51．A
【详解】句意：如果你想要提升你的英语口语，每天练习口语。
考查连词。if如果；though尽管；until直到；unless除非。根据“Practice speaking every day … you want to improve your spoken English.”可知，如果你想提高英语口语，就要每天练习，if引导条件状语从句。故选A。
52．C
【详解】句意：众人拾柴火焰高。除非所有成员共同努力，否则将一事无成。
考查连词辨析。if如果；until直到；unless除非；although尽管。分析句子可知，除非共同努力，否则什么也不会实现，故用unless引导条件状语从句。故选C。
53．A
【详解】句意：如果你没有地图或向导，你可能很容易在雨林迷路。
考查连词辨析。if如果；unless除非；though虽然；until直到。根据“You may easily lose your way in the rain forest...you don’t have a map or a guide.”可知，你容易在雨林中迷路如果没有地图或向导，后句为前句情况出现的条件，用if引导的条件状语从句。故选A。
54．C
【详解】句意：除非我能想出更好的礼物，否则我将给妈妈买一条裙子。
考查条件状语从句。buy买，动词原形；bought买，过去式；will buy一般将来时；have bought现在完成时。根据“I … a dress for my mother unless I can think of a better idea for a present.”可知，本句是unless引导的条件状语从句，遵循“主将从现”原则，主句应用一般将来时。故选C。
55．D
【详解】句意：——你最好从旅游指南中找到一些短途旅行的主意。——那是个好主意。谢谢你。
考查情景交际。I don’t think so我不这么认为；You can come together你可以一起来；It is too far away太远了；That’s a good idea那是个好主意。根据“You’d better find some ideas for a short trip in a travel guide”及“That’s a good idea”可知，认可对方提出的建议，故选D。
56．A
【详解】句意：——不要把你的垃圾扔在这里！垃圾箱就在那边。——对不起，我不会了。
考查情景交际。Sorry, I won’t“对不起，我不会了”；Not at all“没关系”；You are right“你是对的”；Better not“最好不要”。根据“Don’t throw your rubbish here! The dustbin is just over there.”可知，对方要求不要把垃圾扔这里，要扔垃圾箱里，所以回答应该表示抱歉且不会再有这样的行为。故选A。
57．A
【详解】句意：培养学生自己的学习和思考能力很重要。
考查名词词义辨析。ability能力；progress进步；memory记忆；direction方向。由“develop the…of learning and thinking on their own”可知，此处指培养学习和思考的能力。故选A。
58．D
【详解】句意：——我已经为即将到来的考试做好了准备。 ——干得好！成功总是在一个好的计划之后。
考查名词辨析。spirit精神；goal目标；list清单；plan计划。根据“I have got ready for the coming test”可知此处是说成功总是在一个好的计划之后， 故选D。
59．A
【详解】句意：我们可以在自然历史博物馆里发现有关历史的基本事实。
考查名词辨析。facts事实；methods方法；service服务；advice建议。根据“discover basic … about history in the Natural History Museum”可知，在历史博物馆里可以发现有关历史的事实，故选A。
60．B
【详解】句意：睡前运动可能会让你很难平静下来入睡。
考查动词短语。come down下降；calm down冷静下来；break down分解；fall down跌倒。根据“Exercising before going to bed”可知，睡前运动会让你难以冷静下来入睡。故选B。
61．D
【详解】句意：如果你不看电视，我现在就关了。
考查从属连词。since自从；as当……时候；until直到；unless如果不。根据“I will turn it off now.”可知，此处应用unless引导条件状语从句，表示“你如果不看电视，我就关了”。故选D。
62．C
【详解】句意：如果你在城外旅行，你应该向学校报告你的行程。
考查从属连词辨析。unless除非；until直到；if如果；while在……期间。根据“you travel outside the city”可知，如果你出城，就应该向学校报告你的行程，应用if来引导条件状语从句。故选C。
63．A
【详解】句意：我想知道是否明天他有时间。如果他有空，我会邀请他在我们学校演讲。
考查动词的时态。动词“wonder”后是“if ”引导宾语从句，表达“是否明天他有时间”,根据“tomorrow” 可知从句是一般将来时，动词用“will have”。后半句是“if”引导的条件状语从句，主句用一般将来时，从句是一般现在时表示将来，表达“如果他有空”，be动词用“is”。故选A。
64．B
【详解】句意：如果你坐这趟火车，你将在五小时后到达北京。
考查一般将来时。arrive“到达”，if引导的条件状语从句，时态上要符合“主将从现”原则，所以空缺处用一般将来时，构成：主语+will+动词原形，故选B。
65．C
【详解】句意：如果你在考试前感到紧张，你可以深呼吸，让自己冷静下来。
考查条件状语从句中的时态。分析句子可知，此句为if引导的条件状语从句，遵循“主情从现”，主句中的can为情态动词，从句要用一般现在时。故选C。
66．A
【详解】句意：——你相信他说的话吗？——除非有更多的细节可以证明（他说过的话），否则我不会接受。
考查连词辨析。Unless“除非”；If“如果”；Although“尽管”；Since“既然”。根据“there are more details to prove that, I will not accept it.”可知，除非有更多的细节可以证明他所说的话，不然我不会接受的；应用unless引导条件状语从句。故选A。
67．D
【详解】句意：——许多中国的学生都患有近视。——如果我们不做些什么来改善这种状况的话，那将会是一个严重的问题。
本题考查从属连词。根据“It will be a serious problem”“we do something to improve the situation”可知，两句话之间是条件关系。如果我们不采取行动那么它将会是严重的问题。此处需要假设第二句话不发生，才会出现第一句话的结果。因此，应该使用unless“如果不”。故选D。
【点睛】易错分析：本题容易只简单判断两个句子是条件关系而错选B，实际上是第二句里的事不发生才会有第一句的结果，因此应该使用if...not或者unless。
68．A
【详解】句意：——为什么莱恩太太说话声音这么大？——因为如果她不提高声音，教室后面的学生就听不见她。
考查从属连词辨析。if如果；until直到；though虽然；unless除非。“she didn’t raise her voice”是“the students at the back of the classroom couldn’t hear her”的条件，用if引导条件状语从句，故选A。
69．B
【详解】句意：除非你更加努力，否则你不可能在英语学习上取得进步。
考查连词辨析。if如果；unless除非；so因此；until直到……为止。空后句子“you work harder”是空前句子的条件状语，两个句子的意思转折，因此空处需要表示转折关系的从属连词unless来引导条件状语从句，故选B。
70．C
【详解】句意：——劳动教育对学生的发展很重要。——是的。如果学校将其付诸实践，学生将更加独立和乐于助人。
考查连词辨析。while当……时；unless除非；if如果；though尽管。“schools put it into practice”是“students will be more independent and helpful”的肯定条件，用if引导条件状语从句，故选C。
71．C
【详解】句意：——我敢肯定他已经付了票钱。——当然没付！除非我记性不好。
考查从属连词。that作宾语从句引导词，引导陈述句，无意义，或引导定语从句；if如果，是否；whether是否；unless除非。根据“I’m in no doubt”可知，此处是宾语从句，引导陈述句，应用“that”；根据“Of course not!”可知，回答者认为他没有付钱，除非是记性不好，应用“unless”。故选C。
72．A
【详解】句意：——保罗在操场上受了重伤。让我们扶他起来。——除非你知道一些急救知识，否则不要移动他。
考查连词辨析。unless除非；if如果；until直到；although虽然。分析主句“Don’t move him”和从句“you know some first-aid knowledge”的关系可知，应是“除非你知道一些急救知识，否则不要移动他”，用unless引导条件状语从句。故填A。
73．C
【详解】句意：——你为什么在路上扔白石头？——如果我不这样做，我们会迷路的。
考查从属连词辨析。Until直到；As soon as一……就；Unless除非，如果不；Although虽然，尽管。根据“...I do, we’ll be lost.”可知，如果不扔石头，就会迷路，用unless引导条件状语从句。故选C。
74．C
【详解】句意：虽然大多数人在网上获得新闻，但纸质报纸不会很快消失。
考查连词辨析。because因为；since既然；though虽然；unless除非。“most people get news online”和“printed newspapers won’t disappear in a hurry”之间构成让步关系，用though引导让步状语从句。故选C。
75．A
【详解】句意：如果明天我有时间，我会打扫房间。
考查条件状语从句的主将从现。if引导的条件状语从句遵从“主将从现”原则，如果主句表达将来含义，从句用一般现在时替代一般将来时。根据句子结构，主句为将来时，则从句应用一般现在时替代一般将来时。故选A。
76．D
【详解】句意：当地政府建议人们在疫情期间，如果没有必要，不要前往其他地方。
考查非谓语动词和连词辨析。advise sb (not) to do sth“建议某人（不要）做某事”，排除AB。unless除非；if如果。根据“advises people...to other places”可知，“it is not necessary during the pandemic”是“The local government advises people...to other places”的肯定条件，用if引导条件状语从句。故选D。
77．B
【详解】句意：除非你亲自去那里，否则你不会完全体验外国的文化。
考查连词辨析。because因为；unless除非；as soon as一……就；as long as只要。“you go there in person”是“You won’t fully experience the culture of a foreign country”的否定条件，用unless引导条件状语从句。故选B。
78．A
【详解】句意：——你可以猜一猜今天下午迈克是否要去游泳吗？——好的，我想如果他有空，他会和我们一起去的。
考查动词时态。前句是if引导的宾语从句，主句是一般现在时，从句的时态由从句的时间状语或语境决定，由时间状语“this afternoon”可知，这件事还没发生，应用一般将来时态（will go）；后句是if引导的条件状语从句，主句“he will go with us”是一般将来时，从句要用一般现在时态（表示将要发生的动作），由主语“he”，可知be用is，填is free。故选A。
79．D
【详解】句意：——大卫想知道你明天是否要野餐。——是的，但如果下雨，我们就去博物馆。
考查动词时态。第一个if引导的是宾语从句，主句为一般现在时，从句为任意时态，此处从句有“tomorrow”，使用一般将来时，结构为will do，使用陈述句语序；第二个if引导的是条件状语从句，根据“主将从现”原则，从句使用一般现在时，主语为it，使用动词第三人称单数。故选D。
80．D
【详解】句意：学习写作就是学习思考。 除非你把事情写下来，否则你不会清楚地了解它们。
考查连词辨析。whether是否；after在……之后；since自从；unless除非。根据“You don’t know things clearly … you write them down”可知，除非把东西写下来，否则不会清楚，故选D。
81．D
【详解】句意：除非你完成所有的任务，否则你不会得到特别的礼物。
考查连词辨析。after在……之后；because因为；while当……时。unless除非。根据“You will not get the special gift … you finish all the tasks.”可知，本句是unless引导的条件状语从句，表示“除非”。故选D。
82．B
【详解】句意：除非我有空，否则今天下午我不会去看电影的。
考查连词辨析。or否则，或者；unless除非；because因为；than比。根据“I won’t go to the movies this afternoon...I’m free.”可知，后句是前句的否定条件，除非有空否则不会去看电影。故选B。
83．C
【详解】句意：如果我们不每天打扫，我们的教室就不会干净。
考查连词辨析。after在……之后；while当……时候；unless除非，如果不；because因为。前半句表示“教室不会干净”，而后半句表示“我们每天打扫”。空白处应用unless，意为“除非”，引导条件状语从句。故选C。
84．A
【详解】句意：除非天气好转，否则我们将不得不取消户外野餐。
考查连词辨析。unless除非；if如果；because因为；when当……时。根据“the weather improves, we’ll have to cancel the outdoor picnic.”可知，除非天气好转，否则要取消野餐活动，用unless引导条件状语从句，故选A。
85．D
【详解】句意：我不知道他明天是否会来。如果他来了，我会打电话给你。
考查从句时态。根据“I don’t know if he ... tomorrow.”可知，该句是if引导的宾语从句，从句时间状语“tomorrow”表示将来，故要用一般将来时；再根据“If he ..., I will call you.”可知，第二句是if引导的条件状语从句，遵循“主将从现”，从句要用一般现在时表将来；主语“he”为第三人称单数，动词要用三单形式。故选D。
86．A
【详解】句意：除非你尽了最大的努力，否则你永远不知道自己能取得多大的进步。
考查连词辨析。unless除非，如果不；although虽然；if如果；so因此。根据“you try your best”和“You will never know how much progress you can make”可知，此处使用unless引导条件状语从句，表示“如果你不尽力，你就不知道自己能取得多大进步”。故选A。
87．A
【详解】句意：——据说昨天有一个外国人来到我们村。——除非我亲眼看到，否则我不会相信。
考查连词辨析。unless除非；because因为；after在……以后；though尽管。根据“I won’t believe it...I see it with my own eyes.”可知后句是前句的否定条件，应用unless引导条件状语从句，故选A。
88．C
【详解】句意：——贝蒂，你知道托尼是否会参加摄影比赛吗？——他会的，如果他完成了他在澳大利亚的工作。
考查时态。第一个句子是if“是否”引导的宾语从句，此时主句是现在时，从句时态遵循“主现从不限”，且由语境可知“参加比赛”是将来的动作，应用一般将来时will do，排除AB；第二个句子是if“如果”引导的条件状语从句，遵循“主将从现”，主句用一般将来时，从句用一般现在时，主语是“he”，谓语动词用第三人称单数形式。故选C。
89．B
【详解】句意：只要我们不放弃尝试，我们就能取得成功。
考查连词辨析。even though即使；as long as只要；as if似乎；as soon as一……就。“我们不放弃尝试”是“取得成功”的条件，因此是as long as引导的条件状语从句，故选B。
90．D
【详解】句意：——我担心电子书可能对我们的眼睛有害。——只要我们好好利用它们，它们会有帮助的。
考查连词辨析。So that以便；Even though即使；As soon as一……就……；As long as只要。根据句意可知，“we put them to good use”是”they will be helpful”的条件，所以用as long as引导条件状语从句。故选D。
91．B
【详解】句意：因为新冠，今年冬天除非你必须离开长春，否则不要离开长春。
考查连词辨析。if如果；unless除非；when当……时；after在……之后。“you have to this winter”是“don’t leave Changchun”的否定条件，用unless引导条件状语从句。故选B。
92．B
【详解】句意：——李老师，如果你的学生在课堂上不遵守规则，你会生气吗？——有一点，但我会用友好的方式阻止他们。
考查连词辨析。if如果；unless除非，如果不，相当于if not；until直到……；as soon as一……就……。根据“Mrs. Li, will you be angry … your students follow the rules in class ”可知本句表达的是：李老师，如果你的学生在课堂上不遵守规则，你会生气吗？因此这里用unless，意为“如果……不”，故选B。
93．C
【详解】句意：空气污染会变得更严重，除非我们采取行动保护环境。
考查条件状语从句的主将从现。根据“unless”可知该句为条件状语从句，遵循“主将从现”原则，主句应用一般将来时，从句应用一般现在时。根据语境可知，主句表示“空气污染会更严重”，因此will be来表示；从句表示“我们采取行动”，应用take action来表示。故选C。
94．A
【详解】句意：——我想知道下个月是否有运动会。——如果有，你会参加什么运动？
考查If的用法。根据“I want to know if ”可知，此处if表示“是否”，结合next month，句子时态是一般将来时，will be符合句意；再者根据“what kind of sport will you take part in”可知，此处if表示“如果”，遵循主将从现原则，从句时态是一般现在时，因此comes符合句意。故选A。
95．D
【详解】句意：如果新冠肺炎病毒得到控制，我们可以去国外。
考查条件状语从句和介词辨析。unless除非，引导条件状语从句；under在下面；if如果；out of越出……之外。根据“the COVID-19 virus is…control.”可知，第一个空应该是由if引导的条件状语从句；第二个空是be under control，得到控制。故选D。
96．C
【详解】句意：——妈妈，你明天会带我去公园吗？——如果不下雨的话。
考查条件状语从句。A. won’t将不；B. doesn’t不；C. isn’t不；D. won’t be将不。if引导的条件状语从句遵循“主将从现”的时态原则，主句用了一般将来时，if引导的从句则用一般现在时，故排除AD。否定形容词借助be动词，否定实意动词借助助动词，因为rainy为形容词，所以用be动词， 故选C。
97．B
【详解】句意：我不知道南希明天是否会去爬山。如果她不去，我也不去。
考查动词时态和倒装句。第一空所在句是if引导的宾语从句，根据“主现从不限”原则可知，从句时态不受限制，由“tomorrow”可知，从句用一般将来时，排除A、C；第二空所在句是if引导的条件状语从句，遵循“主将从现”原则，且第二空表示上面的情况同样适用于另一主语，表“……也不”，因此用neither will I，意为“我也不去”。故选B。
98．A
【详解】句意：我不知道他明天是否来。如果他来，我会打电话给你。
考查时态。第一空位于宾语从句中，根据时间状语“tomorrow”可知，用一般将来时；在时间或条件状语从句中，可以用一般现在时代替将来时。第二空考查主句是一般将来时，if条件句应用一般现在时态表将来。故选A。
99．C
【详解】句意：除非人口增长得到控制，否则地球上的生活将变得不安。
考查连词辨析。although虽然；because因为；unless除非；when当……时。“population growth is under control”是“Life on the Earth will become uneasy”的否定条件，用unless引导条件状语从句，故选C。
100．C
【详解】句意：如果你中途不放弃，你的梦想就会实现。坚持住！
考查连词辨析。if如果，引导条件状语从句；until直到，引导时间状语从句；unless除非，引导条件状语从句；because因为，引导原因状语从句。结合语境分析，后半句是一个条件状语从句，空处表示“除非”。故选C。
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