外研版初中英语八年级下册Module 3 Unit 3 随堂小练笔
一、单选题
1．Betty ______ from school for a long time.
A．has left B．has been away C．did leave D．will leave
【答案】B
【知识点】过去开始发生的动作一直持续到现在；动词辨析
【解析】【分析】句意：贝蒂已经离开学校很久了。根据for a long time可知时态为现在完成时，故排除CD。且动词应为持续性含义，leave离开，短暂性动词，故选B。
【点评】考查现在完成时。掌握短暂性动词和延续性动词用法。
2．Daming ______ this pen for 5 years. He ______ it in 2014.
A．has bought; bought B．bought; bought
C．has kept; has bought D．has had; bought
【答案】D
【知识点】过去完成时；一般过去时
【解析】【分析】句意：大明买这支笔已经五年了。他是在2014年买的。根据时间段for 5 years，可知第一空时态应为现在完成时，且动词为延续性含义，故排除AB。根据时间状语in 2014可知时态为一般过去时，故选D。
【点评】考查现在完成时和一般过去时。根据时间状语确定句子时态。
3．Mr Brown and his family ______ China for four years.
A．have been to B．have come to C．have gone to D．have been in
【答案】D
【知识点】动词辨析
【解析】【分析】句意：布朗先生和他的家人在中国已经待了四年了。根据for four years可知，时态应为现在完成时，且动词应表示延续性用法。come， go是短暂性动词，be延续性动词，只有D表示状态，故选D。
【点评】考查现在完成时。注意短暂性动词和延续性动词用法区别。
4．—______ have you been studying English
—For two years.
A．How often B．How long C．How soon D．How much
【答案】B
【知识点】疑问词辨析
【解析】【分析】句意：——你学习英语多长时间了？——两年了。A多久一次（问频率），B多长时间（问时间段），C多快（问将来时间），D多少（问数量/价格）。根据 For two years. 可知问多久，故选B。
【点评】考查疑问词辨析。根据答语确定所使用的特殊疑问词。
5．—Jack, why have you decided_______ Chinese folk music as a course
—To learn more about Chinese culture.
A．take B．taken C．taking D．to take
【答案】D
【知识点】固定搭配
【解析】【分析】句意：——Jack，为什么你已经决定参加中国的民间音乐作为一门课程？——为了更多了解中国文化。decide to do sth.决定做某事，故选D。
【点评】考查固定搭配，注意平时识记。
二、完形填空
6．完形填空
I always believed in UFOs, but I didn't see one. My husband
didn't believe in UFOs before that （1） .
Last Friday night, he drove home （2） work. He drove near a gas station
(加油站) when he saw a bright light. It looked （3） a light. It was low, and it wasn't
moving. He didn't （4） too
much about it. He thought maybe it was a street light, so he （5） up farther and then the light
went off. But a few minutes later, it was on. He stopped the car. He （6） and looked around, but saw nothing.
After a short while
the （7） was
on again. He got on the car and drove another 2 miles to our house. He sat in the
（8） for
a few minutes thinking of what he saw. He got out of the car and the moving light
went off. Then when he looked back, he could （9） it in the sky. Then he was （10） it must be a UFO. He went into
our house and told me about it.
（1）A．morning B．afternoon C．night D．year
（2）A．before B．then C．of D．after
（3）A．like B．of C．out D．over
（4）A．watch B．look C．think D．guess
（5）A．drove B．ran C．walked D．jumped
（6）A．got in B．got down C．got off D．got on
（7）A．noise B．train C．car D．light
（8）A．gas station B．car C．bedroom D．office
（9）A．watch B．hear C．see D．look at
（10）A．bored B．sure C．interested D．surprised
【答案】（1）C；（2）D；（3）A；（4）C；（5）A；（6）C；（7）D；（8）B；（9）C；（10）B
【知识点】人物传记/故事阅读类
【解析】【分析】主要讲了作者上周五晚上看到了UFO。
（1）句意：我的丈夫在那晚之前不相信UFO。A.早上；B.下午；C.晚上；D.年。根据Last Friday night可知故事发生在上周五晚上，故选C。
（2）句意：下班后他开车回家。根据句意可知是下班后开车回家，after work下班后，故选D。
（3）句意：它看起来像一盏灯。look like看起来像，故选A。
（4）句意：他没有关于它思考太多。think about思考，故选C。
（5）句意：所以他开车往前。A.开车；B.跑；C.步行；D.跳。根据文章可知作者丈夫是开车去的，故选A。
（6）句意：他下车，然后环顾四周。get on上车，get off下车，根据句意可知环顾四周肯定是下车，故选C。
（7）句意：一会后当灯再次亮了时。A.噪音；B.火车；C.汽车；D.灯。根据前文可知是灯亮了，故选D。
（8）句意：他坐在汽车里几分钟，思考他看到的。A.加油站；B.汽车；C.卧室；D.办公室。根据句意可知作者的丈夫开车下班，所以是坐在车里，故选B。
（9）句意：他能够在天空里看见它。根据句意可知是看见，即表示结果，所以用see，故选C。A.看，指的是看电视等；B.听见；C.看见，强调结果；D.看，强调看的过程。
（10）句意：他相信它一定是UFO。be sure相信，故选B。
【点评】考查完形填空，考查词汇在篇章中的运用能力，答题时首先要跳过空格通读文章掌握其大意，然后细读文章字斟句酌逐一作答，注意考虑句型、语法、搭配、语境等因素。最后通读一遍检查验证。
三、补全对话
7．从方框中选出适当的句子完成对话。
A: Hi, Tim.
B: I'm looking for some information about Journey to Mars.
A: Journey to Mars Do you want to travel to Mars
B: No, it's the name of a book. It's about space travel.
A: I see.
B: No, I haven't. I'm not interested in space travel.
A: But there are too many people on the earth.
B: So you want to know something about Mars, right
A: Yes. Have you heard the latest news A spaceship has traveled to Mars.
B: Yes, I have. So I'm afraid people can't live there.
A: Then scientists have to discover some other planets for people to live on.
B: Yes, what can we do now
A: We should study hard to improve our environment.
B: You're right.
A. I think it's impossible for the common people. B. Maybe we have to live on other planets one day. C. But scientists haven't discovered any life on it. D. What are you doing E. Have you ever read it before
【答案】D；A；E；B；C
【解析】【分析】（1）根据答语I'm looking for some information about Journey to Mars.可知是询问“你在干什么”，故选D。
（2）根据答语No, it's the name of a book. It's about space travel.可知是误解了Tim的意思，以为Tim想去火星旅行，故选A。
（3）根据答语 No, I haven't. I'm not interested in space travel.可知是现在完成时的一般疑问句，故选 E。
（4）根据上文 But there are too many people on the earth.可推知要表达“也许有一天我们等生活在另外一个星球上”之意，故选B。
（5）根据下文 So I'm afraid people can't live there.可知选C。“但是科学家们还没有在上面发现生命迹象。”
【点评】本题考查补全对话。解答此类题目，需要根据所提供的答语或是后文进行作答，同时，做题过程中也可以使用排除法，将选项带到文章中逐一的作答，答完后注意通读检查是否符合逻辑，语义顺畅。
四、句型转换
8．句型转换
sb have/has done sth.
sb have/has not done sth.
Have/Has sb done sth
（1）The astronauts have travelled to the planet．(改为否定句)
The astronauts to the planet．
（2）We have already started to explore other planets．(改为一般疑问句)
you to explore other planets
（3）I think we should look for another hotel to live in．(改为否定句)
I we look for another hotel to live in．
（4）John reached Paris yesterday．(同义句转换)
John Paris yesterday．
（5）Her mother has been to Hong Kong several times．(对划线部分提问)
her mother been several times
【答案】（1）haven't；travelled
（2）Have；started；yet
（3）don't；think；should
（4）arrived/got；in/to
（5）Where；has
【知识点】句型转换
【解析】【分析】(1)句意：宇航员们已经去过这个星球了。 改为否定句就是：宇航员们没有去过这个星球。句子是现在完成时，肯定句改为否定句，把助动词have后加not变成否定式，缩写形式为haven't，其余成分保持不变，故答案为haven't，travelled .
(2)句意：我们已经开始探索其他行星。原句是现在完成时态，改为一般疑问句要把助动词have/has 提至句首，用yet取代 already，其余成分保持不变，故答案为Have，started，yet .
(3)句意：我想我们应该找另一家住的旅馆。 主句的谓语动词是think，并且主句的主语是第一人称，从句的否定词一般要转移到主句上来，变成I don't think，从句不需要否定，故答案为don't，think，should .
(4)句意：约翰昨天到达巴黎。reach=arrive in=get to .....，意为到达。reached是过去式，arrive和get也要变成过去式，故答案为arrived/got，in/to .
(5)句意：她的母亲已经去过香港好几次了。对画线部分Hong Kong提问，用where，哪里。句子用的是现在完成时态，改为特殊疑问句，将has提到疑问词后面，其余成分保持不变，故答案为Where，has。
【点评】考查句型转换，注意对现在完成时的否定句和疑问句的结构的掌握，否定前移句式、以及同义词的积累熟记。
五、选词填空（词汇运用）
9．选词填空。
call，possible，send，different，get，close，might，although，large，discover
Lots of scientists believe there's life on other planets．Because of this，they keep doing research about the universe．They have sent astronauts to the moon．And they have the answer．There's no life on the moon．Not long ago they spaceships to Mars．There，they didn't find life．And they found the environment of Mars was from that of the earth．Then they knew it was for people to live on Mars．
they haven't received a message from other planets，they believe their idea is right．Recently they have a planet．It's Proxima Centauri．It's very to our earth．It is just over four light years away．Proxima Centauri is than the earth．And there's water on this planet．That mean that life is possible there．Now scientists are studying this planet．Soon they will tell people the answer．
【答案】got；sent；different；impossible；Although；discovered；called；close；larger；might
【知识点】选词填空；语法填空；固定搭配
【解析】【分析】段落大意：许多科学家认为其他星球上有生命的存在，为此他们已知探索宇宙。但现在已知月球上没有生命。火星上的环境和地球不相同，最近他们发现一个名叫比邻星的星球。上面有水，现在科学家正在研究这一星球，不久的将来会有答案的……
①据上文送了宇航员去月球，那么就已经获得答案，所以answer 前填get,构成过去分词got ,have got 已经获得。
②时间状语Not long ago，一般过去时时间状语，不久一起发射太空船进入，短语send……to……，send变过去式sent。
③句意：他们发现火星的环境和地球上……。此句有form,联想的短语 be different from与……不同……，所以填different。
④句意：然后他们知道对人类来说在火星上居住……。it was+一个形容词，根据前后意思填possible的反义impossible（不可能）恰当。
⑤句意：……他们没有收到来自其他星球的信息，他们仍然相信他们的想法是正确的。句首引导词填Although尽管，比较恰当。
⑥句意：最近他们……一个行星。据题意应该是已经发现了一个行星，故填discover构成过去分词discovered，注意Recently的完成时用法时间状语。
⑦句意：它……比邻星。据题意填名叫构成短语 be called.被叫做……。故填called。
⑧句意：它……我们的地球。构成短语be close to 离……近……。离我们的地球近。
⑨句意：比邻星比地球……。有比较级标志词than ,所以用large变比较级larger。构成比地球大。
⑩句意：那……意味着生命可能在哪儿。可能性推测用情态动词might。
【点评】此题考查语篇理解和词汇在段落中的综合运用。
六、填空题
10．用方框中所给短语的适当形式填空
What wilI our life be like by the year 2100 It's difficult for us (imagine)．People (live)on the earth for so many years．It is becoming more and more crowded and polluted．Maybe people will live on the other planet--Mars．Astronauts (not be)to Mars yet so far．Let's imagine what our life will be like on Mars．I think life on Mars will be better than (those)on the earth in many ways．People will have more space．Robots will do most of work．so people will have more time for (hobby)．What's more，there will be no school on Mars．Every student will have a computer at home．They can study，do their homework and take exams online．
【答案】to imagine；have lived；haven't been；that；hobbies
【知识点】语法填空
【解析】【分析】大意：短文畅想了2100年人们住在火星上的生活。
（1）句意：对我们来说很难想象。固定句式it is+形容词+动词不定式，表示做某事是……的。故答案为to imagine。
（2）句意：人们在地球上住了这么多年。for+时间段，表示一段时间，可用于现在完成时，have/has+过去分词。主语是people，助动词用have。故答案为have done。
（3）句意：宇航员们至今没有去过火星。yet，还没，用于现在完成时，have/has+过去分词。主语是astronauts，助动词用have，此处是表示否定，用haven't，故答案为haven't been。
（4）句意：我认为在火星上的生活会在很多方面比在地球上更好。此处是life in Mars和life on the earth作比较，用that替代life，故答案为that。
（5）句意：因此人们会有更多的时间花费在爱好上。hobby，爱好，是可数名词，主语是people，爱好肯定不止一个，hobby用复数形式，hobbies，故答案为hobbies。
【点评】考查语法填空，注意首先理解句意和所给单词的意思，抓住句中所给的关键信息，如固定搭配、句型或者短语等，写出单词的适当形式。
1 / 1外研版初中英语八年级下册Module 3 Unit 3 随堂小练笔
一、单选题
1．Betty ______ from school for a long time.
A．has left B．has been away C．did leave D．will leave
2．Daming ______ this pen for 5 years. He ______ it in 2014.
A．has bought; bought B．bought; bought
C．has kept; has bought D．has had; bought
3．Mr Brown and his family ______ China for four years.
A．have been to B．have come to C．have gone to D．have been in
4．—______ have you been studying English
—For two years.
A．How often B．How long C．How soon D．How much
5．—Jack, why have you decided_______ Chinese folk music as a course
—To learn more about Chinese culture.
A．take B．taken C．taking D．to take
二、完形填空
6．完形填空
I always believed in UFOs, but I didn't see one. My husband
didn't believe in UFOs before that （1） .
Last Friday night, he drove home （2） work. He drove near a gas station
(加油站) when he saw a bright light. It looked （3） a light. It was low, and it wasn't
moving. He didn't （4） too
much about it. He thought maybe it was a street light, so he （5） up farther and then the light
went off. But a few minutes later, it was on. He stopped the car. He （6） and looked around, but saw nothing.
After a short while
the （7） was
on again. He got on the car and drove another 2 miles to our house. He sat in the
（8） for
a few minutes thinking of what he saw. He got out of the car and the moving light
went off. Then when he looked back, he could （9） it in the sky. Then he was （10） it must be a UFO. He went into
our house and told me about it.
（1）A．morning B．afternoon C．night D．year
（2）A．before B．then C．of D．after
（3）A．like B．of C．out D．over
（4）A．watch B．look C．think D．guess
（5）A．drove B．ran C．walked D．jumped
（6）A．got in B．got down C．got off D．got on
（7）A．noise B．train C．car D．light
（8）A．gas station B．car C．bedroom D．office
（9）A．watch B．hear C．see D．look at
（10）A．bored B．sure C．interested D．surprised
三、补全对话
7．从方框中选出适当的句子完成对话。
A: Hi, Tim.
B: I'm looking for some information about Journey to Mars.
A: Journey to Mars Do you want to travel to Mars
B: No, it's the name of a book. It's about space travel.
A: I see.
B: No, I haven't. I'm not interested in space travel.
A: But there are too many people on the earth.
B: So you want to know something about Mars, right
A: Yes. Have you heard the latest news A spaceship has traveled to Mars.
B: Yes, I have. So I'm afraid people can't live there.
A: Then scientists have to discover some other planets for people to live on.
B: Yes, what can we do now
A: We should study hard to improve our environment.
B: You're right.
A. I think it's impossible for the common people. B. Maybe we have to live on other planets one day. C. But scientists haven't discovered any life on it. D. What are you doing E. Have you ever read it before
四、句型转换
8．句型转换
sb have/has done sth.
sb have/has not done sth.
Have/Has sb done sth
（1）The astronauts have travelled to the planet．(改为否定句)
The astronauts to the planet．
（2）We have already started to explore other planets．(改为一般疑问句)
you to explore other planets
（3）I think we should look for another hotel to live in．(改为否定句)
I we look for another hotel to live in．
（4）John reached Paris yesterday．(同义句转换)
John Paris yesterday．
（5）Her mother has been to Hong Kong several times．(对划线部分提问)
her mother been several times
五、选词填空（词汇运用）
9．选词填空。
call，possible，send，different，get，close，might，although，large，discover
Lots of scientists believe there's life on other planets．Because of this，they keep doing research about the universe．They have sent astronauts to the moon．And they have the answer．There's no life on the moon．Not long ago they spaceships to Mars．There，they didn't find life．And they found the environment of Mars was from that of the earth．Then they knew it was for people to live on Mars．
they haven't received a message from other planets，they believe their idea is right．Recently they have a planet．It's Proxima Centauri．It's very to our earth．It is just over four light years away．Proxima Centauri is than the earth．And there's water on this planet．That mean that life is possible there．Now scientists are studying this planet．Soon they will tell people the answer．
六、填空题
10．用方框中所给短语的适当形式填空
What wilI our life be like by the year 2100 It's difficult for us (imagine)．People (live)on the earth for so many years．It is becoming more and more crowded and polluted．Maybe people will live on the other planet--Mars．Astronauts (not be)to Mars yet so far．Let's imagine what our life will be like on Mars．I think life on Mars will be better than (those)on the earth in many ways．People will have more space．Robots will do most of work．so people will have more time for (hobby)．What's more，there will be no school on Mars．Every student will have a computer at home．They can study，do their homework and take exams online．
答案解析部分
1．【答案】B
【知识点】过去开始发生的动作一直持续到现在；动词辨析
【解析】【分析】句意：贝蒂已经离开学校很久了。根据for a long time可知时态为现在完成时，故排除CD。且动词应为持续性含义，leave离开，短暂性动词，故选B。
【点评】考查现在完成时。掌握短暂性动词和延续性动词用法。
2．【答案】D
【知识点】过去完成时；一般过去时
【解析】【分析】句意：大明买这支笔已经五年了。他是在2014年买的。根据时间段for 5 years，可知第一空时态应为现在完成时，且动词为延续性含义，故排除AB。根据时间状语in 2014可知时态为一般过去时，故选D。
【点评】考查现在完成时和一般过去时。根据时间状语确定句子时态。
3．【答案】D
【知识点】动词辨析
【解析】【分析】句意：布朗先生和他的家人在中国已经待了四年了。根据for four years可知，时态应为现在完成时，且动词应表示延续性用法。come， go是短暂性动词，be延续性动词，只有D表示状态，故选D。
【点评】考查现在完成时。注意短暂性动词和延续性动词用法区别。
4．【答案】B
【知识点】疑问词辨析
【解析】【分析】句意：——你学习英语多长时间了？——两年了。A多久一次（问频率），B多长时间（问时间段），C多快（问将来时间），D多少（问数量/价格）。根据 For two years. 可知问多久，故选B。
【点评】考查疑问词辨析。根据答语确定所使用的特殊疑问词。
5．【答案】D
【知识点】固定搭配
【解析】【分析】句意：——Jack，为什么你已经决定参加中国的民间音乐作为一门课程？——为了更多了解中国文化。decide to do sth.决定做某事，故选D。
【点评】考查固定搭配，注意平时识记。
6．【答案】（1）C；（2）D；（3）A；（4）C；（5）A；（6）C；（7）D；（8）B；（9）C；（10）B
【知识点】人物传记/故事阅读类
【解析】【分析】主要讲了作者上周五晚上看到了UFO。
（1）句意：我的丈夫在那晚之前不相信UFO。A.早上；B.下午；C.晚上；D.年。根据Last Friday night可知故事发生在上周五晚上，故选C。
（2）句意：下班后他开车回家。根据句意可知是下班后开车回家，after work下班后，故选D。
（3）句意：它看起来像一盏灯。look like看起来像，故选A。
（4）句意：他没有关于它思考太多。think about思考，故选C。
（5）句意：所以他开车往前。A.开车；B.跑；C.步行；D.跳。根据文章可知作者丈夫是开车去的，故选A。
（6）句意：他下车，然后环顾四周。get on上车，get off下车，根据句意可知环顾四周肯定是下车，故选C。
（7）句意：一会后当灯再次亮了时。A.噪音；B.火车；C.汽车；D.灯。根据前文可知是灯亮了，故选D。
（8）句意：他坐在汽车里几分钟，思考他看到的。A.加油站；B.汽车；C.卧室；D.办公室。根据句意可知作者的丈夫开车下班，所以是坐在车里，故选B。
（9）句意：他能够在天空里看见它。根据句意可知是看见，即表示结果，所以用see，故选C。A.看，指的是看电视等；B.听见；C.看见，强调结果；D.看，强调看的过程。
（10）句意：他相信它一定是UFO。be sure相信，故选B。
【点评】考查完形填空，考查词汇在篇章中的运用能力，答题时首先要跳过空格通读文章掌握其大意，然后细读文章字斟句酌逐一作答，注意考虑句型、语法、搭配、语境等因素。最后通读一遍检查验证。
7．【答案】D；A；E；B；C
【解析】【分析】（1）根据答语I'm looking for some information about Journey to Mars.可知是询问“你在干什么”，故选D。
（2）根据答语No, it's the name of a book. It's about space travel.可知是误解了Tim的意思，以为Tim想去火星旅行，故选A。
（3）根据答语 No, I haven't. I'm not interested in space travel.可知是现在完成时的一般疑问句，故选 E。
（4）根据上文 But there are too many people on the earth.可推知要表达“也许有一天我们等生活在另外一个星球上”之意，故选B。
（5）根据下文 So I'm afraid people can't live there.可知选C。“但是科学家们还没有在上面发现生命迹象。”
【点评】本题考查补全对话。解答此类题目，需要根据所提供的答语或是后文进行作答，同时，做题过程中也可以使用排除法，将选项带到文章中逐一的作答，答完后注意通读检查是否符合逻辑，语义顺畅。
8．【答案】（1）haven't；travelled
（2）Have；started；yet
（3）don't；think；should
（4）arrived/got；in/to
（5）Where；has
【知识点】句型转换
【解析】【分析】(1)句意：宇航员们已经去过这个星球了。 改为否定句就是：宇航员们没有去过这个星球。句子是现在完成时，肯定句改为否定句，把助动词have后加not变成否定式，缩写形式为haven't，其余成分保持不变，故答案为haven't，travelled .
(2)句意：我们已经开始探索其他行星。原句是现在完成时态，改为一般疑问句要把助动词have/has 提至句首，用yet取代 already，其余成分保持不变，故答案为Have，started，yet .
(3)句意：我想我们应该找另一家住的旅馆。 主句的谓语动词是think，并且主句的主语是第一人称，从句的否定词一般要转移到主句上来，变成I don't think，从句不需要否定，故答案为don't，think，should .
(4)句意：约翰昨天到达巴黎。reach=arrive in=get to .....，意为到达。reached是过去式，arrive和get也要变成过去式，故答案为arrived/got，in/to .
(5)句意：她的母亲已经去过香港好几次了。对画线部分Hong Kong提问，用where，哪里。句子用的是现在完成时态，改为特殊疑问句，将has提到疑问词后面，其余成分保持不变，故答案为Where，has。
【点评】考查句型转换，注意对现在完成时的否定句和疑问句的结构的掌握，否定前移句式、以及同义词的积累熟记。
9．【答案】got；sent；different；impossible；Although；discovered；called；close；larger；might
【知识点】选词填空；语法填空；固定搭配
【解析】【分析】段落大意：许多科学家认为其他星球上有生命的存在，为此他们已知探索宇宙。但现在已知月球上没有生命。火星上的环境和地球不相同，最近他们发现一个名叫比邻星的星球。上面有水，现在科学家正在研究这一星球，不久的将来会有答案的……
①据上文送了宇航员去月球，那么就已经获得答案，所以answer 前填get,构成过去分词got ,have got 已经获得。
②时间状语Not long ago，一般过去时时间状语，不久一起发射太空船进入，短语send……to……，send变过去式sent。
③句意：他们发现火星的环境和地球上……。此句有form,联想的短语 be different from与……不同……，所以填different。
④句意：然后他们知道对人类来说在火星上居住……。it was+一个形容词，根据前后意思填possible的反义impossible（不可能）恰当。
⑤句意：……他们没有收到来自其他星球的信息，他们仍然相信他们的想法是正确的。句首引导词填Although尽管，比较恰当。
⑥句意：最近他们……一个行星。据题意应该是已经发现了一个行星，故填discover构成过去分词discovered，注意Recently的完成时用法时间状语。
⑦句意：它……比邻星。据题意填名叫构成短语 be called.被叫做……。故填called。
⑧句意：它……我们的地球。构成短语be close to 离……近……。离我们的地球近。
⑨句意：比邻星比地球……。有比较级标志词than ,所以用large变比较级larger。构成比地球大。
⑩句意：那……意味着生命可能在哪儿。可能性推测用情态动词might。
【点评】此题考查语篇理解和词汇在段落中的综合运用。
10．【答案】to imagine；have lived；haven't been；that；hobbies
【知识点】语法填空
【解析】【分析】大意：短文畅想了2100年人们住在火星上的生活。
（1）句意：对我们来说很难想象。固定句式it is+形容词+动词不定式，表示做某事是……的。故答案为to imagine。
（2）句意：人们在地球上住了这么多年。for+时间段，表示一段时间，可用于现在完成时，have/has+过去分词。主语是people，助动词用have。故答案为have done。
（3）句意：宇航员们至今没有去过火星。yet，还没，用于现在完成时，have/has+过去分词。主语是astronauts，助动词用have，此处是表示否定，用haven't，故答案为haven't been。
（4）句意：我认为在火星上的生活会在很多方面比在地球上更好。此处是life in Mars和life on the earth作比较，用that替代life，故答案为that。
（5）句意：因此人们会有更多的时间花费在爱好上。hobby，爱好，是可数名词，主语是people，爱好肯定不止一个，hobby用复数形式，hobbies，故答案为hobbies。
【点评】考查语法填空，注意首先理解句意和所给单词的意思，抓住句中所给的关键信息，如固定搭配、句型或者短语等，写出单词的适当形式。
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