英语情态动词练习题 含答案
(完整版)情态动词专项练习及答案
情态动词专项练习1。
Jean have kept his promise. I wonder why he changed his idea.A. mustB. should C。
need D. would解析：选B。
“should have +过去分词” 表示“过去本来应该（但没能）做某事”；keep one’s promise 意为“信守诺言”。
2。
Jane have come to the party， but she not find the exact time。
A. could； couldB. might; couldC. should； could D。
should； would解析:选A。
“ could have+过去分词表示过去本来应该(但没能)做某事”.3. So many mistakes in your homework！ You more careful.A。
may be B. had to C. would be D. should have been解析：选D。
“You should have been more careful”。
意为：你本来应该更细心的。
4．Her brother be at home now， because he was seen playing basketball in the stadium just now.A。
mustn’t B. needn’t C。
can’t D. shouldn't解析：选C。
can’t be at home 意为：不可能在家.5．-——I can’t understand why ou r boss is late.———He the early bus.A。
could miss B。
may have missedC. can have missed D。
might miss解析：选B. “may have+过去分词"表示对过去动作的判断，意为：可能做了某事。
有关情态动词的专项练习题及答案
情态动词的专项练习题及答案有关情态动词的专项练习题及答案情态动词，本身有一定的.词义，表示语气的单词。
但是情态动词不能独立作谓语，只能和动词原形一起构成谓语。
接下来由小编给您带来情态动词的专项练习题及答案，希望对您有所帮助！情态动词的专项练习题及答案篇11．( )you tell me what’s happening over there ?A． Could B． May C． Might D． Shall2．( ) I have a word with the manager ,sir ?A． Will B． Would C． May D． Can3．— Something flying far away must be a hawk ．— No, it( ) be a hawk ．A．mustn’t B．mightn’t C．can’t D． might4． Man ( )reach the moon or any other star in the universe now, but we get there years ago ．A． can ；couldn’t B． are able to ；weren’t able toC． must ；needn’t D． can ； had to5． Grandfather ，( ) my sister come ?A． Will B． shall C． would D． could6．“ What I do for you ? ” means “( ) I help you ? ”A． can ， May B． shall ； Need C． can ； Can D． will ；Shall7．—Could I borrow your dictionary?—Yes， of course you ( )．A． Might B． will C． can D． should8．The fire spread through the hotel very quickly but everyone ( )get out．A． had to B． would C． could D． was able to9． The monitor must be in the reading－room， ( )?A．mustn’t B．doesn’t C．needn’t D．isn’t10．He hardly ( )say anything more，since you know all about it．A．don’t B．needn’t C． needs D． need11．You ( )to the meeting this afternoon if you have something important to do．A．needn’t to come B．don’t need comeC．don’t need coming D．needn’t come12．—May I pick a flower in the garden ? — ( )．A． No，you needn’t B． Not， pleaseC． No，you mustn’t D． No，you won’t13．—Helen， will you be at the party tonight ?—Yes， but I have so much homework to do that I really ( )．A．won’t B．can’t C．mustn’t D．shouldn’t14． If you listen to me， you ( ) have some candies,Deary ．A． shall B． May C． will D． must15． Peter ____ come with us tonight，but he isn’t very sure yet．A． May B． Can C． will D． must16．—Dare you go home at night ?—_________．A． Yes， I do B． No，I daren’tC． No，I don’t D． Yes， I dare so．17． When you go abroad， do you _____ take your passport ?A． have to B． ought to C． be able to D． need18．—You must phone us every week．—Yes， I _____．A． must B． have to C． will D． should19．—Your language teacher looks a rather kind woman．—But in fact she is cold and hard on us． You _____ believeA． should B．wouldn’t C．mustn’t D． might not．20． A wise man __ sometimes make a mistake．A． can B． may C． might D． must21．—Shall I tell John about it ?—No， you ( )．I’ve told him already．A．needn’t B．wouldn’t C．mustn’t D．shouldn’t22． Tom ought not to ( )me your secret，but he meant no harm．A． have told B． tell C． be telling D． having told23．—When can I come for the photos ? I need them tomorrow afternoon．—They ( )be ready by 12：00．A． Can B． should C． Might D． need24．Sorry I’m late． I ( )have turned off the alarm clock and gone back to sleep again．A． Might B． should C． Can D． will25．—Are you coming to Jeff’s party ?—I’m not sure． I ( )go to the concert instead．A． must B． should C． Would D． might参考答案：ACCAB CBCCD DDDCB AABAC AAAAB情态动词的专项练习题及答案篇21. Peter ________come with us tonight, but he isn’t very sure yet.A. mustB. canC. mayD. will2. — Could you borrow your dictionary?— Yes, of course you ________.A. mightB. willC. canD. should3. A computer ________think for itself, it must be told what toA. can’tB. couldn’tC. may notD. might not4. I didn’t hear the phone, I ________asleep.A. must beB. must have beenC. should beD. should have been5. There was plenty of time, she ________.A. mustn’t have hurriedB. couldn’t have hurriedC. must not hurryD. needn’t have hurried6. The plant is dead. I ________it more water.A. will giveB. would have givenC. must giveD. should have given7. Very loud noises ________make people ill, hurt their ears, or even drive them mad.A. mustB. needC. canD. should8. He asked me for the dictionary many times; please tell him that he ________have it tomorrow.A. mustB. needC. mayD. dare9. — Why is she still standing there?— She ________be waiting for her boyfriend.A. canB. mustC. dareD. need10. Two eyes________ see more than one.A. canB. mustC. mightD. shall11. What ________he mean? ________you tell me?A. can; MayB. can; CanC. may; MayD. must; Should12. How ________he say that his teacher was unfair?A. mustB. mightC. couldD. need13. It ________be very cold in this part.A. canB. oughtC. shallD. dare14. I’d like to ask a question if I ________.A. mustB. willC. mayD. might15. Even in summer the temperature ________suddenly drop below freezing.A. mightB. oughtC. mustD. need16. He decided to join the army so that he ________defend the country.A. may helpB. might helpC. helpsD. helped17. You ________always be talking like that.A. mightn’tB. mayn’tC. can’tD. mustn’t18. The car ________have broke doown just when we were about to start off.A. mustB. couldC. mightD. should19. You ________see him while he is in hospital.A. have betterB. had betterC. would ratherD. had to20. There is a fine sunset; it ________to be a fine day tomorrow.A. oughtB. shouldC. has toD. has better21. You are his father, you ________take care of him.A. mightB. oughtC. ought toD. are able to22. That’s all. It ________be talked about any more.A. needn’tB. mightn’tC. darn’t toD. needn’t to23. The question ________discussing.A. needsB. needC. can beD. must be24. He ________even look out of the window.A. daren’tB. daresn’tC. dared not toD. dares not25. I’m so hungry that I ________find something to eat.A. have toB. wouldC. mayD. can26. All the students ________do their best for the modernization of our country.A. canB. shouldC. mayD. might27. You ________be careful with your homework.A. mustB. have toC. mayD. are used to28. It is getting darker. You ________not go home.A. had betterB. have betterC. would ratherD. would like29. I ________what happened to our school.A. would like knowB. would like to knowC. would like knowingD. would like that I know30. — Would you mind my changing the plan?— ________.A. Oh, no, pleaseB. Yes, I mind notC. No, I wouldD. Yes, I will31. — It ________ be Jack who is in the library.—I’m sure it ________be him, I saw him off at the railway station just two days ago.A. can’t; can’t eB. must; mustn’tC. must; can’tD. can’t; mustn’t32. I ________tell her the truth about his marriage.A. can’t helpB. can’t butC. may not helpD. mustn’t but33. Since she is angry, we ________.A. had better to leave her alongB. should leave her aloneC. would rather to leave her aloneD. must leave her alone34. Look! What you’ve done to me. You ________more careful.A. maybeB. had toC. should have beenD. would be35. ________read the letter for you?A. Would you like meB. Do you want meC. Will you mind meD. Shall I36. He promised he ________not make such silly mistakes.A. wouldB. shouldC. mightD. could37. ________it be true that his father will go abroad?A. CanB. MayC. NeedD. Should38. Those streams are so small that they ________be shown in the maps.A. mustn’tB. may notC. can’tD. may39. — May I use your bike?— ________.A. No, you may notB. No, you mustn’tC. No, you won’tD. Sorry, I’m afraid not40. — Must I write to her?— No, you ________.A. mustn’tB. shouldn’tC. can’tD. don’t have to41. — Need I start tonight?— Yes, you ________.A. doB. needC. mustD. may42. The old man ________sit for hours watching the ships.A. wouldB. shouldC. was used toD. would rather to43. If the telephone ________ring, please wake me up.A. wouldB. shouldC. willD. might44. I wish they ________stop making remarks about me.A. wouldB. willC. shouldD. shall45. You’re thirsty, aren’t you? ________he get some coffee?A. DoesB. ShallC. WouldD. Let46. Which of the following is wrong?A. That may be true.B. That might be true.C. That can be true.D. That could be true.47. — Would you lend me some money?— Yes, I ________.A. wouldB. willC. canD. may48. He ________ swimming when he was young.A. was used to goB. got used to goC. used to goingD. used to go49. You say you ________ not do it, but I say you ________do it.A. will; shallB. shall; shallC. shall; willD. will; will50. You ________out yesterday without a coat. No wonder youcaught cold.A. should have goneB. shouldn’t have goneC. could not have goneD. might have gone51. He ________the 8:30 train because he didn’t leave home until 9:00.A. can’t catchB. couldn’t catchC. may notD. can’t have caught52. You ________us this because we had more than enough.A. needn’t bringB. needn’t have broughtC. mustn’t bringD. co uldn’t have brought53. — He learnt the language in three months.— He ________very hard.A. must workB. might have workedC. must have workedD. might work54. — Who told you my telephone number?—I don’t remember. It ________Mary.—It can’t be Mary, she doesn’t know it.A. may have beenB. can have beenC. must beD. can be55. You ________him, why didn’t you?A. ought to thankB. ought have thankedC. ought to have thankedD. ought thank56. I ________have arrived a little earlier, but my car broke down.A. shouldB. couldC. canD. can’t57. — ________we go out for a walk?—Great. Let’s goA. ShallB. WillC. MayD. Should58. Though she was seriously ill, she ________ complete the work in time.A. wouldB. was able toC. was possible toD. might59. — Would you like to play chess with me?— Yes, ________.A. I’dB. I wouldC. I’d likeD. I’d like to60. Tom is late. He ________the wrong bus.A. must takeB. must have takenC. might takeD. could take1—10. CCABD DCCBA 11—20. BCACA BDDBA 21—30. CAAAA BAABA 31—40. CBBCD AACDD 41—50. CABAB CBDAB 51—60. DBCAC BABDB。
情态动词练习(含答案)
情态动词练习(含答案)一、单项选择情态动词1．I use a clock to wake me up because at six o'clock each morning the train comes by my house.A．couldn't B．mustn'tC．shouldn't D．needn't【答案】D【解析】试题分析：考查情态动词辨析。
A不可能；B禁止，千万不能；C不应该；D不需要；句意：我不需要使用闹钟叫醒我，因为每天早上六点都有一列火车经过我的家旁边。
根据句意可知我不需要使用闹钟。
故D正确。
考点：考查情态动词词义辨析2．Most of the top leaders expressed a common desire at the UN conference, ______ that different cultures ______ coexist with tolerance.A．the one ; must B．the one ; should C．one ; must D．one ; should【答案】D【解析】【详解】考查替代和情态动词。
句意：大多数高层领导人在联合国大会上表达了一个共同的愿望，即不同的文化应该与宽容共存。
大多数高层领导人在联合国大会上表达了一个共同的愿望，即不同的文化应该与宽容共存。
替代表泛指的单数名词，通常用one替代。
此处用one替代前面的a desire，是同位语；结合句意第二空用情态动词should“应该”。
故选D。
【点睛】that ,it ,one 代指前面的名词时的用法1.one 指代前面出现的可数名词，是泛指。
可以和冠词连用，也可以有自己的定语。
一般不能用做特指，但和定冠词连用时可以是特指。
如： Please show me the cup, the red one on the shelf.2.It 指代前面提到的单数名词，相当于the one。
高中英语情态动词形式单选题60题(含答案)
高中英语情态动词形式单选题60题(含答案)1.She ____ be very tired after such a long journey.A.mustB.canC.couldD.might答案：A。
“must”在这里表示肯定的推测，“她在这么长的旅途之后一定很累”。
“can”表示能力、可能性，在此处不太符合语境；“could”表示过去的能力、可能性或委婉语气，也不太符合；“might”表示可能性较小的推测。
2.He ____ speak French fluently when he was young.A.mustB.canC.couldD.should答案：C。
“could”表示过去的能力，“他年轻时能流利地说法语”。
“must”表示肯定的推测，不符合；“can”表示现在的能力；“should”表示应该。
3.You ____ finish your homework before you watch TV.A.mustB.canC.could答案：A。
“must”表示必须，“你必须在看电视之前完成作业”。
“can”表示能力、可能性；“could”表示过去的能力、可能性或委婉语气；“may”表示可能。
4.____ I borrow your pen?A.MustB.CanC.CouldD.Will答案：B。
“Can I...?”表示请求，“我能借你的笔吗？”“Must”表示必须，语气太强；“Could”用于更委婉的请求，但不如“Can”常用；“Will”表示将来。
5.She ____ have forgotten her keys. She's always so careful.A.can'tB.mustn'tC.shouldn'tD.needn't答案：A。
“can't”表示否定的推测，“她不可能忘了钥匙，她总是很细心”。
“mustn't”表示禁止；“shouldn't”表示不应该；“needn't”表示不必。
英语情态动词题20套(带答案)含解析
【解析】
【详解】
考查must have done结构。句意：——吉姆一定觉得我说的话很让人烦，尽管他什么也没说。——所以你是说你得向他道歉？根据“though he didn’t say anything.”可知此处表示对过去事情的肯定推测，用must have done表示“过去一定做了……”，故D项正确。
2、should作为情态动词,可以用在条件状语从句中,表示语气较强的假设,译作“万一”、“竟然”,这时也可将should置于从句之首,即将should放在主语前面,而省略从属连词if。例如：If you should fail to come, ask Mrs Chen to work in your place.（= Should you fail to come, ask Mrs Chen to work in your place.）
A．mayB．canC．mustD．ould
【答案】C
【解析】
【详解】
考查情态动词表猜测的用法。句意：一定是汤姆把车停在这儿的，因为他是唯一有车的人。A. may可能；B. can可能；C. must一定；D. should应该。由as he is the only one with a car.可知一定是他把车停在这里的，非常有把握的肯定推测，故选C。
2．One of our rules is that every student _______ wear school uniform while at school.
A．mightB．could
C．shallD．will
【答案】C
【解析】
【详解】
考查情态动词辨析。句意：我们其中一条规则要求每个学生在校期间都要穿校服。shall可以表示“命令，警告，强制要求；允诺；法律，规定要做……”，结合句意可知C正确。
高中英语情态动词形式练习题40题含答案解析
高中英语情态动词形式练习题40题含答案解析1.She is very quiet. She ____ be shy.A.mustB.canC.mightD.should答案解析：C。
must 表示肯定的推测，语气非常强；can 表示可能性，但在这个语境中不太符合；might 表示可能性较小，符合“她很安静”这个描述推测她可能害羞；should 表示应该，不符合推测的意思。
2.The book is missing. Someone ____ have taken it.A.mustB.canC.mightD.should答案解析：A。
书不见了，一定是有人拿走了，must 表示肯定的推测，语气很强。
can 和might 语气较弱；should 表示应该，不符合语境。
3.He is always late. He ____ be very disorganized.A.mustB.canC.might答案解析：A。
他总是迟到，肯定是非常没有条理，must 表示肯定的推测，语气强。
can 和might 可能性较小；should 表示应该，不合适。
4.The lights are on. Someone ____ be at home.A.mustB.canC.mightD.should答案解析：A。
灯亮着，肯定有人在家，must 表示肯定的推测，语气强。
can 和might 可能性较小；should 表示应该，不符合语境。
5.The test was very difficult. She ____ have passed it.A.mustB.canC.mightD.should答案解析：C。
考试很难，她可能通过了，might 表示可能性较小。
must 语气太强；can 表示可能性，但不太符合这个语境；should 表示应该，不符合推测的意思。
6.He looks very tired. He ____ have worked hard.A.mustB.canD.should答案解析：A。
情态动词练习题及答案
情态动词练习题及答案情态动词练习题及答案情态动词是英语中的一类特殊动词，它们用来表示说话人对某种动作或状态的态度、能力、推测等。
掌握情态动词的用法对于学习英语非常重要。
下面是一些情态动词的练习题及答案，希望对大家的学习有所帮助。
练习题一：根据句意，选择正确的情态动词填空。
1. I ________ swim when I was five years old.a) must b) could c) might2. You ________ eat so much junk food. It's bad for your health.a) mustn't b) shouldn't c) can't3. He ________ be at home. His car is in the driveway.a) must b) can't c) may4. ________ I borrow your pen, please?a) May b) Should c) Will5. She ________ go to the party tonight because she has to study for the exam.a) can't b) shouldn't c) might答案：1. b) could2. b) shouldn't3. a) must4. a) May5. b) shouldn't练习题二：根据句意，选择正确的情态动词填空。
1. You ________ take an umbrella. It looks like it's going to rain.a) could b) should c) must2. He ________ be very tired. He worked all day.a) might b) can c) must3. ________ I help you with your homework?a) Should b) Will c) May4. They ________ be lost. They are not familiar with this area.a) can't b) shouldn't c) may5. She ________ have passed the test. She studied very hard.a) can't b) should c) might答案：1. b) should2. c) must3. c) May4. c) may5. c) might练习题三：根据句意，选择正确的情态动词填空。
情态动词练习题及答案
情态动词练习题及答案1. 你的朋友不会游泳，你告诉他不要跳进深水区。
- 你不能跳进深水区，因为你________游泳。
- 答案：不会2. 老师要求学生必须完成作业。
- 老师告诉我们，我们________完成作业。
- 答案：必须3. 你的朋友问你是否可以借用你的自行车。
- 我可以借用你的自行车吗？- 答案：可以4. 医生建议病人应该每天服用两次药。
- 医生建议病人________每天服用两次药。
- 答案：应该5. 你告诉朋友，你可能会迟到。
- 我可能会迟到。
- 答案：可能6. 你告诉朋友，你不可能完成这个任务。
- 我________完成这个任务。
- 答案：不可能7. 你的朋友问你，他是否需要带伞。
- 你需要带伞吗？- 答案：需要8. 你告诉朋友，你或许会参加晚会。
- 我或许会参加晚会。
- 答案：或许9. 你的朋友问你，他是否应该接受这个工作。
- 你应该接受这个工作吗？- 答案：应该10. 你告诉朋友，你不得不去开会。
- 我________去开会。
- 答案：不得不11. 你的朋友问你，他是否可以明天再交报告。
- 我可以明天再交报告吗？- 答案：可以12. 你告诉朋友，你可能会去度假。
- 我可能会去度假。
- 答案：可能13. 你的朋友问你，他是否应该学习英语。
- 你应该学习英语吗？- 答案：应该14. 你告诉朋友，你不可能在一天内完成这个项目。
- 我________在一天内完成这个项目。
- 答案：不可能15. 你的朋友问你，他是否需要帮忙。
- 你需要帮忙吗？- 答案：需要答案1. 不会2. 必须3. 可以4. 应该5. 可能6. 不可能7. 需要8. 或许9. 应该10. 不得不11. 可以12. 可能13. 应该14. 不可能15. 需要通过这些练习题，学习者可以更好地理解和使用情态动词。
情态动词的使用在英语中非常广泛，掌握它们对于提高英语水平至关重要。
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英语情态动词练习题含答案一、初中英语情态动词1．— _______ you play tennis?—Yes, and I'm a good player.A. CanB. MayC. MustD. Should【答案】 A【解析】【分析】句意：——你会打网球吗？——会，我是一名优秀的网球员。
Can能，表示能力；may可以，表示允许；must必须，表示要求；should应该，表示建议；结合句意，此处表示能力，故用情态动词can，故选A。
【点评】此题考查情态动词的用法。
2．—Where is Monica? I can't find her anywhere.—She be in the library. She loves reading books when she is free.A. mustB. needC. can't【答案】 A【解析】【分析】句意：——莫妮卡在哪？我到处都找不到她。
——她肯定在图书馆，她喜欢空闲时看书。
A肯定，肯定句中表示推测，B需要，C不可能，否定句中表示推测，根据 She loves reading books when she is free ，可知是肯定句表示推测，故选A。
【点评】考查情态动词，注意情态动词表推测的用法。
3．—Shall we meet at the station at 9 a.m.?—In fact we ______. The train ______until 11a.m.A. needn't; will leaveB. needn't; won't leaveC. mustn't; leavesD. mustn't; doesn't leave【答案】 B【解析】【分析】句意：—我们上午9点在车站见面好吗？—事实上我们不需要。
火车直到11点才离开。
needn't情态动词，不需要，没必要；mustn't情态动词，不允许，语气强烈，本题含义只是“不需要”,并没有“禁止、不许”这样强烈的语义。
not...until...，意为“直到...才...”，表示将来发生的事情，所以使用一般将来时态的否定形式won't。
故选：B。
【点评】考查情态动词辨析，固定搭配not...until...。
一般将来时态。
4．Teenagers allowed to drive .A. should not beB. should be notC. not should be【答案】A【解析】【分析】句意：年轻人不应该被允许驾车。
Should是情态动词，其否定表达一般在在后面加副词not，故选A。
【点评】此题考查含有情态动词的被动语态的否定形式。
平时注意记忆情态动词的记忆和用法。
5．You be tired after walking for such a long time. Sit down and have a rest.A. canB. can'tC. mustn'tD. must【答案】 D【解析】【分析】句意：走了这么长时间你一定很累了。
坐下休息一下吧。
can能，能够，can't不能，对事物进行否定推测；mustn't一定不是，禁止，must一定，对事物进行肯定推测，根据after walking for such a long time，可以肯定你一定很累，所以是进行肯定推测，情态动词使用must，故选D。
【点评】此题考查情态动词。
弄清每个情态动词的使用规则，根据句意确定所使用的情态动词。
6．—Where is Mom now?—I'm not sure. She _________ be in the kitchen.A. shallB. mayC. needD. must【答案】 B【解析】【分析】句意：—妈妈现在在哪里？—我不确定，她也许在厨房。
A. shall 将要； B. may 可以，可能； C. need 需要； D. must必须，一定；根据I'm not sure可知是不确定；故选B。
【点评】此题考查情态动词表推测的用法。
7．—I wonder if this smart phone is Mary's.—It _______ belong to her. _______ is totally different from this one.A. mustn't; HerB. can't; HerC. can't; HersD. may; Hers 【答案】C【解析】【分析】句意：――我想知道这个智能机是否是玛丽的。
――不可能属于她，她的和这个完全不同。
情态动词表示推测时，用must表示“一定”，用might, could表示“可能”，用can't表示“不可能”。
从句意看，这手机与她的完全不同，故不可能是她的，前面用can't。
形容词性的物主代词后一定有一个被修饰的名词，名词性的物主代词后没有被其修饰的词，本题后没有被修饰的词，用名词性的物主代词，“她的”：hers。
故选C。
8．—Must I clean the classroom now? —No, you_______.A. mustn'tB. can'tC. needn't【答案】 C【解析】【分析】句意：--我必须现在把教室打扫干净吗？--不，你不必。
must I do …?的否定回答是No, you needn't 或者 No , you don't have to 。
根据是否定回答，故选C。
9．— Dick, ________ I use your e-dictionary? — Yes, sure. ________ you give it to David afteryou use it?A. will; WouldB. may; MightC. can; CouldD. shall; Should【答案】 C【解析】【分析】句意:一Dick我可用一下你的电子词典吗?一当然可以。
在你用完后你能把它给他David吗？根据句意及题干分析第一空表示请求允许，所以可以用may或can;第二空是表示对别人的请求.所以用could表示更加委婉，故选C。
10．—Mum, I play football this afternoon?—Sure, but you finish your homework first.A. may; couldB. can; mustC. can; mustn'tD. may; can't【答案】 B【解析】【分析】句意：－妈妈，今天下午我能踢足球吗？－当然，但是你必须先完成作业。
前句提请求，can,may都可以；后句，由sure可知后句用肯定回答。
Could表示一种委婉的语气；must表示主观愿望：必须。
妈妈要求孩子“必须”先完成作业。
故选B。
【点评】考查情态动词辨析，may表示请求时候的回答用语。
11．——Do you have any plans for this summer vacation? ——I'm not sure. I ___ take a trip to Taiwan.A. mustB. needC. mayD. should【答案】C【解析】【分析】句意:一今天暑假你有什么计划吗?一我还不确定。
我可能去台湾去旅行。
A.必须，一定;B.需要，必要;C.可能;D.应该。
根据句中I'm not sure可知，说话人还没有确定的计划，所以这只是一个可能，应选C。
12．A hard-working man ______ become a great scientist, but a great scientist _______ be ahard-working man.A. can't; canB. may not; mustC. can't; mustD. may not; can【答案】 B【解析】【分析】句意：一个勤奋的人可能不会成为一位伟大的科学家，但是一位伟大的科学家一定是一个勤奋的人。
can't不可能，不会；can可能，能，会；may not 可能不；must 必须，一定；结合句意，可知，第一个空为“可能不”，第二个空为“一定”，故答案为B。
【点评】考查情态动词。
掌握情态动词表推测时的意义和用法。
13．——You look pretty in green, Kate. ——Thank you. I like green. Green ______give me energy.A. canB. mustC. shouldD. has to【答案】A【解析】【分析】句意:一一凯特，你穿看绿色的衣服很漂亮。
一一谢谢，我喜欢绿色。
绿色给我能量。
A.能，表示能力;B.must必须，强调主观愿望;C.应该，强调责任与义务;D.必须.强调客观要求。
绿色能给我力量，我喜欢。
故选A。
14．— __________I wear a tie to Janet's birthday party?— No,you needn't. But do remember to bring her a present.A. MustB. ShouldC. NeedD. Can【答案】 A【解析】【分析】句意：——我必须戴领带去参加Jane的生日聚会吗？——不，你不必，但是记住给她带个礼物。
对于must的否定回答是用needn't。
而should应该；need需要；can可以。
所以根据回答可知选A。
【点评】考查情态动词的基本用法。
15．This book _________ be Lucy's. Look! Her name is on it.A. canB. mayC. mustD. might【答案】C【解析】【分析】句意：这本书一定是露西的。
看，她的名字在上面。
A. can 能；B. may 可能，可以；C. must 必须，一定；D. might可能；根据Her name is on it.可知一定是她的，故选C。
【点评】考查情态动词。
根据语境选出合适的情态动词，熟记情态动词的用法。
16．You __________ write the poem down. Our teacher will give us a copy soon.A. needn'tB. mustn'tC. shouldn'tD. can't【答案】A【解析】【分析】句意:你不需要把诗抄下来，老师很快会给我们一份。