2024年译林版备战中考单项选择专练(1)(含解析)

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名称 2024年译林版备战中考单项选择专练(1)(含解析)
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更新时间 2024-04-21 13:57:43

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2024年译林版备战中考单项选择专练(1)
题号 一 总分
得分
一、单选题:本大题共50小题,共50分。
1.— Bruce ______ so much in the past two years.
— Yeah, he ______ be shy, but now he is confident and active.
A. has changed; used to B. changed; is used to
C. changed; used to D. has changed; is used to
2.Simon ______ his ship in a big storm when a giant fish came out of the sea.
A. will sail B. is sailing C. was sailing D. has sailed
3.If it doesn't rain, we ________ hiking tomorrow.
A. go B. went C. will go D. have gone
4.——Excuse me, could you please tell me if the sports meeting ______ on time
——Hard to say. If it ______ tomorrow, we'll have to put it off.
A. will hold; rains B. will be held; rains
C. will be held; will rain D. holds; will rain
5.—I don't know if she ______.
—She will come if it ______.
A. comes; won't rain B. comes; doesn't rain
C. will come; doesn't rain D. will come; won't rain
6.—What will the weather be like tomorrow —I was on the phone and ________ most of the weather report.
A. have missed B. was missing C. will miss D. missed
7.—I wonder if Tom ______ this afternoon.
—Don't worry. I will tell you as soon as he ______.
A. will come; comes B. comes; will come C. comes; comes
8.The weather is changeable these days. It ______ rainy and cloudy in the past few days. I hope that tomorrow will be a sunny day.
A. will be B. is C. has been D. was
9.—Hi, Andy! You look so excited. What happened
—The result of the competition ______ we were looking forward to ______ to be better.
A. /; turned out B. which; finding out
C. that; working out D. that; came out
10.—Ms. Wang, I asked you a question on QQ last night, but received no reply.
—Sorry, I ______ today's lessons then. What's that
A. am preparing B. was preparing C. prepared D. have prepared
11.—There was a big fire in the house last night. That's a terrible accident.
—Luckily, the firemen ______ the house to save the people trapped inside.
A. put out B. let off C. open up D. broke into
12.Vicky finds ______ important for people to have a balanced diet every day.
A. it B. one C. this D. that
13.—Our computer is working again!
—Yes. Our IT teacher ______ it. It took him about an hour.
A. will fix B. is fixing C. fixes D. has fixed
14.You may have a better view of the whole city, ______ you reach the top of Nanjing Zifeng Tower.
A. so B. unless C. if D. though
15.Nanjing Forest Music Festival is worth attending ________ it mixes traditional Chinese music and modern Western music.
A. while B. until C. whenever D. because
16.—Shirley, shall we watch the film Born to Fly this weekend?—I'm afraid not. I _______ it twice and the story of Chinese pilots really touched me.
A. watch B. watched C. was watching D. have watched
17.Paul misses his parents a lot. He ______ them since he came to work in Shanghai a year ago.
A. didn't see B. doesn't see C. hasn't seen D. won't see
18.—Happiness is about having each tiny wish come true.
—______ we study hard, we'll make our life full of happiness.
A. If B. Unless C. Because D. Though
19.—Shall we meet at the zoo gate at 8 a.m.?—In fact we needn't. It ________ until 9 a.m.
A. doesn't open B. opens C. didn't open D. opened
20.—Why didn't you answer my phone, Dad?—I _______ in the kitchen then. I didn't hear the sound.
A. cooked B. have cooked C. am cooking D. was cooking
21.Students should attend Labour Courses_______ they can learn some life skills.
A. if B. unless C. so that D. in order to
22.—Jerry, did you hear what I said just now —Sorry, sir. I ________ a phone.
A. will answer B. am answering C. have answered D. was answering
23.—Music and art will enter the Entrance Examination for the high school. Is it true —I am not sure. But don't worry. Nothing will be difficult if more attention ________ to them.
A. will pay B. will be paid C. pays D. is paid
24.—Millie, I called you last night but no one answered.
—Sorry. I ______ Zhang Yimou's new film Sniper then.
A. watch B. watched C. am watching D. was watching
25.There is a Chinese saying that goes, "The whole year's work ________ a good start in spring."
A. carries on B. stands for C. makes up D. depends on
26.—Chinese women's football team won the Asia Cup again after 16 years.—That was a great moment. I ________ the game on TV all the time.
A. have watched B. watched C. am watching D. was watching
27.There _______ two cats on the chair just now, but now there _______ nothing on it.
A. have; has B. has; has C. were; is D. were; was
28.—Daniel has gone to Beijing on business.
—Oh, I didn't know. When ______
A. has he left B. was he leaving C. did he leave D. will he leave
29.Nobody knows if he ______. If he ______ here, I'll call you at once.
A. will come ,will arrive B. will come, arrives
C. comes , arrive D. comes ,will arrive
30.If it is sunny tomorrow, my parents ______ me to the park.
A. take B. took C. will take D. have taken
31.My brother ______ the Indian film Dangal when I phoned him yesterday.
A. watches B. has watched C. is watching D. was watching
32.——Do you know if Mr. Wu ______ to our school tomorrow ——I've no idea. If he ______, everyone ______ very happy.
A. will come; comes; will be B. will come; will come; is
C. comes; will come; will be D. comes; comes; will be
33.—I'm afraid I can't finish the task in such a short time.
—Don't worry. Can you finish it if you two more days
A. give B. are given C. will give D. will be given
34.If he ______ to the party, he will be happy.
A. invite B. invites C. is invited D. is inviting
35.— We'll have a party for the 100th birthday of CPC(中国共产党)if it_____this weekend.
— Great!But nobody knows if it______.
A. won't rain;will be fine B. doesn't rain;will be fine
C. doesn't rain;is fine D. won't rain;is fine
36.—__________ you __________ Frank yet —Yes. I __________ him a moment ago.
A. Will; call; called B. Have; called; called
C. Have; called; have called D. Did; call; have called
37.﹣﹣_____ to the United States? ﹣﹣No, never, but I _____to Australia a few years ago.
A. Have you gone to, have gone B. Have you been, went
C. Do you go, went D. Will you go , have gone
38.—I wonder if you ________ sakura (樱花) with me in Wu Han University this year. —I will go if I ________ time.
A. admire; have B. will admire; have
C. will admire; will have D. admire; will have
39.﹣﹣How did the accident happen? ﹣﹣﹣You know,it ________difficult to see the road clearly because it_________.()
A. was; was raining B. is; has rained
C. is; is raining D. will be; will rain
40.When you _____ the office,you d better _____ that all the lights are turned off.()
A. leave; make sure B. leave; to make sure
C. will leave; make sure D. will leave; to make sure
41.﹣How long have you________this new computer? ﹣For two months. I________it in Parking Supermarket.()
A. bought, bought B. bought, had C. had, had D. had, bought
42.Johnson ______on May 1. He ______for several years.()
A. died; has been dead B. was killed; has died
C. was dead; has been killed D. was died; has been dying
43.If people ______ the traffic rules, there will be fewer traffic jams and accidents.
A. will obey B. obey C. break D. will break
44.I ______ along the street looking for a place to park
the accident happened.
A. went; when B. went; while
C. was going; when D. was going; while
45.—If you always ______ yourself with others, you may have tons of stress.
—I agree. But sometimes stress can pay off.
A. compare B. complain C. connect D. consider
46.—Where is your uncle, Jane
—He is in Guangzhou. He ______ for a month.
A. has left B. has gone C. left D. has been away
47.- did your uncle leave for the capital of Denmark?
- Let me see. He for nearly 20 months.(  )
A. When; has left B. When; has been away
C. How long; has left D. How long; has been away
48.—Why didn’t you answer my phone just now —Sorry, I ________ for some good TV shows that are worth watching online.
A. am searching B. have searched C. was searching D. searched
49.Mrs. Li is very kind. She ______ these poor children since 2010.
A. helps B. has helped C. helped D. is helping
50.—Hurry up! Miss Smith ______ for you in the teachers' office.
—I am in big trouble.
A. waits B. waited C. is waiting
答案和解析
1.【答案】A
【解析】句意:——布鲁斯在过去的两年中变化很大。——是的,他以前很害羞,但现在他很自信和积极。第一处根据“in the past two years”可知,用现在完成时,排除BC;第二处根据“but now he is confident and active”可知,强调与现在的对比,用used to be结构,是一般过去时。be used to do sth“被用来做某事”,不符合语境。故选A。
2.【答案】C
【解析】句意:西蒙正在暴风雨中航行,这时一条大鱼从海里游了出来。句子为when引导的时间状语从句,结合从句的came可知,从句的动作发生在过去,时态为一般过去时,所以此处主句要用过去进行时,表示从句的动作在过去发生时,主句的动作也正在发生。过去进行时结构为“was/were+动词的现在分词”。故选C。
3.【答案】C
【解析】句意:如果不下雨,我们明天就去远足。句子是if引导的条件状语从句,从句是一般现在时,主句应用一般将来时。故选C。
4.【答案】B
【解析】句意:——打扰一下,请你告诉我运动会是否按时举行?——很难说,如果明天下雨我们必须推迟。分析句子结构可知,第一个空是if引导的宾语从句,表示将来会发生的事,要用一般将来时态,the sports meeting做主语,是动作的承受者,应该用被动语态,一般将来时态的被动语态的结构是“will be +动词的过去分词”;第二个空是if引导的条件状语从句,根据主将从现原则,主句用一般将来时态,从句用一般现在时态,主语是it,动词用第三人称单数形式,用rains。结合选项可知,故选B。
5.【答案】C
【解析】句意:——我不知道她是否将会过来。——如果不下雨,她将会过来。在宾语从句中,如果主句的时态是一般现在时,宾语从句的时态根据自己的需要决定,根据题意可知,此处应用一般将来时will come;在条件状语从句中,应该遵循主将从现的时态原则,根据题意可知,此处应用一般现在时doesn't rain。依据题意,故选C。
6.【答案】D
【解析】句意:——明天的天气怎么样?——我刚刚在打电话,错过了大部分天气预报。have missed为现在完成时;was missing为过去进行时;will miss为一般将来时;missed为一般过去时。根据“was on the phone”可知,空处应用一般过去时。故选D。
7.【答案】A
【解析】句意:——我不知道汤姆今天下午是否会来。——别担心。他一到我就告诉你。if引导宾语从句,主句是一般现在时,从句时态不受限制,结合this afternoon故用一般将来时:will+动词原形;as soon as引导时间状语从句,遵循“主将从现”的规则,从句主语he,动词用第三人称单数形式。故选A。
8.【答案】C
【解析】句意:这些天天气多变。过去几天一直阴雨连绵。我希望明天是个晴天。will be,用于一般将来时;is,用于一般现在时;has been,用于现在完成时;was,用于一般过去时。根据in the past few days(过去几天)可知,这是现在完成时的时间状语,结构为“has been”。故选:C。
9.【答案】A
【解析】句意:——嗨,安迪!你看起来很兴奋。发生什么事?——我们所期待的比赛结果最终是更好的。
turn out最终成为,结果是;find out发现,查明;work out计算出;come out出来,出版。we were looking forward to是定语从句,先行词result是物,在定语从句中作looking forward to的宾语,可以用关系代词that或which引导定语从句,也可以省略。第二个空格要填主句的谓语动词,结合前句What happened是一般过去时可知,此句也用一般过去时,谓语动词用过去式,排除选项BC;选项D语意不通。故选A。
10.【答案】B
【解析】句意:——王女士,我昨晚在QQ上问了你一个问题,但是没有收到回复。——对不起,我那时正在准备今天的课程。怎么了?根据I asked you a question on QQ last night(我昨晚在QQ上问了你一个问题),I ....today's lessons then.(我那时......今天的课程。),可知表示过去某个时刻正在发生的动作,应该用过去进行时,主语是I,构成是:主语+was+v.ing+其他。故选:B。
11.【答案】D
【解析】句意:——昨晚房子里起了一场大火。那是一个可怕的事故。——幸运的是,消防队员闯入房子,救了被困在里面的人。put out扑灭;let off让...下车,引爆;open up开业,张开;broke into闯入,都是动词短语。根据句意可知,消防队员“闯入”房子,救了被困在里面的人,故选:D。
12.【答案】A
【解析】句意:Vicky发现人们每天有一个均衡的饮食是重要的。it它;one一个;this这;that那。根据观察和分析可知题干使用了find it+形容词+to do sth句型结构,其中it是形式宾语;真正宾语是动词不定式,形容词是宾语补足语。故选:A。
13.【答案】D
【解析】句意:——我们的电脑又能工作了!——是的。我们的信息技术老师把它修好了。他花了大约一个小时。根据Our computer is working again可知,修理了之后对现在的影响就是电脑可以工作了,用现在完成时have/has done的结构。A一般将来时;B现在进行时;C一般现在时;D现在完成时。故选:D。
14.【答案】C
【解析】句意:如果你到达南京紫峰大厦的顶层你可能会更好地看到整个城市。A所以,表因果关系;B如果不,除非,引导条件状语从句;C如果,引导条件状语从句;D尽管,引导让步状语从句。根据句意,可知you reach the top of Nanjing Zifeng Tower(你到达南京紫峰大厦的顶层)是更好的俯瞰整个城市的条件,用条件状语从句,表肯定。故选:C。
15.【答案】D
【解析】句意:南京森林音乐节是值得参加的,因为它融合了中国传统音乐和现代西方音乐。A.while当……的时候;B.until直到;C.whenever无论何时;D.because因为。根据语境可知,前后句之间表达的是因果关系,因此应用because来引导原因状语从句。故选D。
16.【答案】D
【解析】句意:——雪莉,我们这个周末看电影《长空之王》好吗?——我恐怕不行。我已经看过两次而且中国飞行员的故事真的感动了我。A.一般现在时;B.一般过去时;C.过去进行时;D.现在完成时。根据I'm afraid not. I ______ it twice (我恐怕不行。我已经看过两次)可知,看电影的动作已经发生,对现在产生的影响是touched me(感动了我),故用现在完成时。故选D。
17.【答案】C
【解析】句意:保罗非常想念他的父母。自从一年前来到上海工作以来,他就没有见过他们。根据since he came to work in Shanghai a year ago可知,since从句用一般过去时,则主句时态用现在完成时。A一般过去时;B一般现在时;C现在完成时;D一般将来时。故选:C。
18.【答案】A
【解析】句意:——幸福是每一个微小的愿望都能实现。——如果我们努力工作,我们的生活就会充满幸福。If如果;Unless除非;Because因为;Though虽然。“我们努力工作”,是“我们的生活就会充满幸福”的条件,用If引导条件状语从句,主句一般将来时态,从句一般现在时态。故选:A。
19.【答案】A
【解析】句意:——我们上午8点在动物园门口见面好吗?——事实上,我们没有必要。直到上午9点才开门。根据In fact we needn't. It...until 9 a.m.可知,没必要八点到,因为动物园直到九点才开门,not...until直到……才,我i固定用法。结合语境可知,此处时态为一般现在时。故选A。
20.【答案】D
【解析】句意:——爸爸,你为什么没有接我电话?——那时候我正在厨房做饭。我没有听见声。A.cooked 一般过去时;B.have cooked 现在完成时;C.am cooking 现在进行时;D.was cooking过去进行时。根据语境可知,爸爸不接电话的原因是当时正在厨房里做饭,打电话的那个时候他正在做什么,发生在过去某一时刻的动作用过去进行时表达。故选D。
21.【答案】C
【解析】句意:学生应该参加劳动课程,以便他们能学习一些生活技能。if如果;unless除非;so that以便;in order to为了,后跟动词原形。根据Students should attend Labour Courses以及they can learn some life skills.可知,此处应用so that引导目的状语从句。故选C。
22.【答案】D
【解析】句意:——杰瑞,你听到我刚才说的话了吗?——不好意思,先生。我刚刚正在打电话。根据时间状语“right now”可知杰瑞接电话的动作发生在过去,且一直在听电话,所以没有听到提问者说的话,故用过去进行时,结构为was/were doing。故选D。
23.【答案】D
【解析】句意:——音乐和艺术将参加高中入学考试。这是真的吗?——我不确定。但别担心。如果对它们给予更多的关注,没有什么是困难的。主句“ Nothing will be difficult”是一般将来时,根据if引导条件状语从句“主将从现”的原则,结合主语“more attention”与谓语动词“pay”是动宾关系,可知,从句用一般现在时的被动语态。故选D。
24.【答案】D
【解析】句意:——米莉,我昨晚打电话给你,但没人接。——对不起,我当时正在看张艺谋的新片《狙击手》。根据“Millie, I called you last night but no one answered.”可知,此处表示我昨天晚上正在看电影,表示过去正在发生的动作,用过去进行时,故选D。
25.【答案】D
【解析】句意:有一句中国谚语,“一年之计在于春”。carry on继续;stand for代表;make up弥补;depend on依据。根据"The whole year's work...a good start in spring."可知一整年的工作取决于春天的好开始。故选D。
26.【答案】D
【解析】句意:——中国女足时隔16年再次赢得亚洲杯冠军。——那是一个伟大的时刻。我一直在电视上看比赛。根据Chinese women's football team won the Asia Cup again after 16 years.可知,女足得冠是发生过的事,根据"... all the time."可知比赛的时候,一直在看电视,指过去某一段时间一直在做的事,用过去进行时。故选D。
27.【答案】C
【解析】句意:刚才有两只猫在椅子上,现在一个也没了。根据句中的时间状语just now和now可断定,前一句要用一般过去时态,后一句要用一般现在时态。表示“某地有某物”要用there be句型,且there be句型确定谓语时,采用就近原则,第一空主语two cats是复数,用were;第二空主语nothing是单数,谓语用is。故选C。
28.【答案】C
【解析】句意:——丹尼尔去北京出差了。——哦,我不知道。他什么时候离开的?“离开”的动作发生在过去,应用一般过去时,疑问句借助助动词did。故选C。
29.【答案】B
【解析】句意:没有人知道他是否会来,如果他来了,我将给你打电话。第一空处,if译为“是否”,引导宾语从句,表示“将要来”,用一般将来时。第二空处if译为如果,引导条件状语从句,用主将从现原则,即主句用一般将来时,if引导的从句用一般现在时,故选B。
30.【答案】C
【解析】句意:如果明天天气晴朗,我父母会带我去公园。分析句子结构可知,此处为if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,其构成是:will+动词原形。故选C。
31.【答案】D
【解析】考查时间状语从句的时态。句意:我昨天给我哥哥打电话的时候他正在看印度电影《摔跤吧!爸爸》。结合when I phoned him yesterday可知表达的是过去正在进行的动作,故用过去进行时was/were+doing,主语my brother,be动词用was,故选D。
32.【答案】A
【解析】句意:你知道明天吴老师是否会来我们学校吗?——我不知道,如果他来,每个人都会很高兴。结合语境可知上文宾语从句中描述的是将来发生的动作,故用一般将来时态。下文主句描述的也是将来的动作,故也用一般将来时态,当主句描述将来动作时,英语条件从句中一般用一般现在时态表示将来的动作,故下文第一空用一般现在时态,故选A。
33.【答案】B
【解析】句意:——恐怕我不能在这么短的时间内完成任务。——别担心,如果再给你两天的时间能够完成吗?设空处所在的句子是if引导的条件状语从句,从句时态用一般现在时;主语you是动作give的承受者,所以用被动语态;一般现在时被动语态的构成是:主语+am/is/are+动词的过去分词。根据分析,故选B。
34.【答案】C
【解析】句意:如果他被邀请参加派对,他会很开心的。if引导条件状语从句,从句中用一般现在时;主语he和谓语动词invite之间是逻辑上的动宾关系,应用被动语态;一般现在时的被动语态结构为am/is/are+动词的过去分词,故选C。
35.【答案】B
【解析】句意:——如果这个周末不下雨的话,我们将为中国共产党100岁生日举办一个聚会。——太好了!但没人知道天是不是晴朗。。第一句为if 引导的条件状语从句,译为"如果",若主句是一般将来时,从句用一般现在时.it是主语,第三人称单数,动词要用第三人称单数形式doesn't rain。第二句是由if 引导的宾语从句,译为"是否",作nobody knows 的宾语,此时根据需要选用时态,因为不知天是否晴朗,所以用一般将来时态will be fine。故选B。
36.【答案】B
【解析】考查现在完成的和一般过去时。根据yet可知,上文是现在完成时have/has+过去分词,主语you对应的助动词是have,疑问句需把have提到句首,排除A和D;根据a moment ago可知,此句是一般过去时,排除C。故选B。
37.【答案】B
【解析】考查动词时态。句意:——你去过美国吗?——没有,从没去过,但是我几年前去过澳大利亚。have been to去过某地,have gone to到某地去了,根据句意"你去过美国吗?没有,从没去过,但是我几年前去过澳大利亚."和时间状语a few years ago可知,前句用现在完成时"去过",后句用一般过去时。故选B。
38.【答案】B
【解析】考查动词的时态。句意:我想知道今年你会不会和我去武汉大学赏樱花。如果我有时间的话,我会去的。根据句意可知,第一个if意为“是否”,后面应用一般将来时;第二个if引导条件状语从句,主句用将来时,从句应用一般现在时。故选B。
39.【答案】A
【解析】考查一般过去时和过去进行时。句意:事故是怎样发生的?——你知道,因为在下雨很难看清路。结合How did the accident happen可知表达的是过去的事情,故用一般过去时,结合it ________difficult to see the road clearly用it was+adj.+to do sth.做某事是怎样的。后文是表达过去正在进行的动作,故用过去进行时was/were+doing,故选A。
40.【答案】A
【解析】句意:当你离开办公室的时候,你最好确保所有的灯是关闭的。第一空考查when引导是时间状语从句,用一般现在时,第二空you'd better后面接动词原形,故选A。
41.【答案】D
【解析】考查时态。句意:——这台新的电脑你买多久了?——两个月,我在停车场超市买的。结束性动词的动作一经发生,短时间内就会结束,不能持续进行下去.所以它不能和表示一段时间的状语连用;而延续性动词的动作是可以持续进行的,因此可以和表示一段时间的状语连用。题目当中两个空的意思,虽然从汉语的角度说都是"买"的意思,但问句的疑问词是How long,它是对一段儿时间状语进行提问的,意思是"多长时间",所以它只能连用延续性的动词;buy是结束性动词,习惯上用have代替;第二个句子没有时间,所以我们可以直接用结束性动词buy来表示;第一空用have的过去分词had,第二个空是buy的过去式bought。故选D。
42.【答案】A
【解析】考查动词时态。句意:约翰逊在五一去世了.他已经去世几年了。根据第一句中的时间状语on May 1,可知要用一般过去时态。die不能用被动语态,故可排除D。再根据第二句中的时间状语for several years可是句中的谓语动词要用延续性动词,故可排除BC。故选A。
43.【答案】B
【解析】句意:如果人们遵守交通规则,交通堵塞和交通事故就会减少。obey遵守,break破坏,根据there will be fewer traffic jams and accidents事故减少,可推知应该是遵守交通规则,排除C和D;根据该句为含有if引导的条件状语从句的复合句,主句为一般将来时态,从句为一般现在时态表将来,排除A。故选B。
44.【答案】C
【解析】句意:当我沿着大街找停车点时,事故发生了。结合the accident happened这里用的短暂性动词,用when引导时间状语从句,主句用过去进行时,从句应用一般过去时,故选C。
45.【答案】A
【解析】句意:——如果你总是拿自己和别人比较,你可能会有很大的压力。——我同意。但是有时候压力是有回报的。compare比较;complain抱怨;connect连接;consider考虑。根据you may have tons of pressure“你可能会有很大的压力”可知,compare yourself with others“拿自己和别人比较”。故选A。
46.【答案】D
【解析】句意:——Jane,你的叔叔呢?——他在广州,他已经去了一个月了.由最后一句的时间提示语“for a month”可知,应用现在完成时态,排除C。left是leave的过去分词,为非延续性动词,不能和表示一段的时间状语for连用,排除A。has gone后面要加to,排除B,leave的延续性动词是be away表示状态,而完成时态是has been away。故选D。
47.【答案】B
【解析】leave为短暂性动词,不能与表示一段的时间状语连用,也不能用在How long疑问句中;首先排除C,D;for nearly 20 months表示的是时间段,只能用leave的延续性形式be away,时态为现在完成时,故答案为B.
故选:B。
--你叔叔是什么时间动身前往丹麦首都的呢?
--让我想一想.他已经离开将近20个月了.
仔细分析句子的结构,根据for nearly 20 months,结合选项作答.
48.【答案】C
【解析】句意:——你刚才为什么不接我的电话?——抱歉,我正在搜索一些值得在线观看的好电视节目。
考查过去进行时。根据“Why didn’t you answer my phone just now ”可知,此处表示对方打电话来时,“我”正在搜索一些值得在线观看的好电视节目。表示过去某一时刻正在发生的动作,应用过去进行时。故选C。
49.【答案】B
【解析】句意:李太太很善良。她自2010年起就帮助这些可怜的孩子。根据句意"李太太很善良。她自2010年起就帮助这些可怜的孩子 "和时间状语since 2010可知,要用现在完成时,其构成为have/ has done。故选B。
50.【答案】C
【解析】句意:——快点!Smith老师正在教师办公室等你。——我有大麻烦了。根据语境及关键信息Hurry up可知,这里指说话时,谓语wait(等候)动作正在进行,应用现在进行时态,即is waiting符合语境。干扰项A项是一般现在时态,B项是一般过去时态;均不符合语境。故选C。
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