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情态动词专题练习(word)

情态动词专题练习（word）

一、初中英语情态动词

1．—We've got everything ready for the picnic.

—Do you mean I __________ bring anything with me?

A. can't

B. mustn't

C. couldn't

D. needn't

【答案】 D

【解析】【分析】句意：—我们已经为野餐准备好了一切。—你的意思是我不必带任何东西吗？A. can't 不能；B. mustn't 表示禁止，一定不要；C. couldn't不能，表示过去时态；D. needn't不必。结合句意，故选D。

【点评】本题考查情态动词的用法。

2．All passengers ______ go through safety check before they take a plane.

A. can

B. may

C. must

D. could

【答案】 C

【解析】【分析】句意：所有乘客登机前必须接受安全检查。A. can能够，表示能力；B. may可以，表示许可；C. must必须；D. could可能，可以。登机前必须安检。故选C。

【点评】情态动词词义辨析。以及can、may、must、could四个词的词义和用法。

3．A hard-working man ______ become a great scientist, but a great scientist _______ be a hard-working man.

A. can't; can

B. may not; must

C. can't; must

D. 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。

4．—Shall we meet at the station at 9 a.m.?

—In fact we ______. The train ______until 11a.m.

A. needn't; will leave

B. needn't; won't leave

C. mustn't; leaves

D. 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。

5．You be tired after walking for such a long time. Sit down and have a rest.

A. can

B. can't

C. mustn't

D. 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．— Is this e-dictionary Jack's?

— No, it_______ his. His is much newer.

A. can't be

B. mustn't be

C. may be

D. should be

【答案】 A

【解析】【分析】句意：-这个电子字典是杰克的吗？--不可能是他的，他的更新些。must,can（could）,may（maight）可以表示猜测，must表示肯定猜测，用于肯定句，肯定……，一定……；can’t,表示否定猜测，肯定不……，另外can（could）,may（maight），表示可能性猜测，可能……。根据后文的依据，可知是否定猜测，故选A

7．—Who it be that is knocking at the door?

—It be father, but I'm not sure.

A. call; must

B. can; may

C. must; can

D. may; must

【答案】 B

【解析】【分析】句意：——敲门的人可能是谁呢？——他可能是父亲，但是我不确定。第一空，can可能，表猜测用语疑问句形式，may是表可能；第二空，根据后面的but I'm not sure，可知表示不确定的猜测，应填may，故选B。

【点评】此题考查情态动词辨析。先弄清每个情态动词的使用规则。根据上下文的联系确定情态动词的使用。

8．—I wonder if this smart phone is Mary's.—It _______ belong to her. _______ is totally different from this one.

A. mustn't; Her

B. can't; Her

C. can't; Hers

D. 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。

9．We don't allow taking magazines out, but you ____________ copy the article you need on the machine over there.

A. can

B. must

C. should

D. would

【答案】 A

【解析】【分析】句意：我们不允许把杂志带出去，但是你可以在那里抄下你需要的文

章。can能，能够，可以；must必须；should应该；would将；此处表示可以，允许，故

选A。

【点评】此题考查情态动词辨析。弄清每个情态动词的使用规则，根据上下文的联系确定

所使用的情态动词。

10．—He be in the classroom,I think.

—No, he be in the classroom. I saw him go home a minute ago.

A. can； may not

B. must； may not

C. may； mustn't

D. may； can't

【答案】 D

【解析】【分析】句意:——我认为他可能在教室里。——不，他肯定没有在教室里，我刚

才看到他回家了。must,can（could）,may（might）可以表示猜测，must表示肯定猜测，用

于肯定句，肯定……一定……；can't表示否定猜测，肯定不……，另外can（could）,may （might）,表示可能性猜测，可能……根据I think,可知把握较小，根据I saw him go home a minute ago.可知第二句把握大，故选D。

11．Rock music ______ sound popular with the young, but it's not the favor of the aged people.

A. must

B. need

C. should

D. may

【答案】 D

【解析】【分析】句意：摇滚音乐在年轻人中听起来受欢迎，但是它不受上了年龄的人的

赞同。must, 表示猜测时，指把握比较大的肯定猜测，肯定……；need需要；should,应该；may，表示把握比较小的肯定猜测，可能，也许。结合句意，故选D。

【点评】考查情态动词辨析，注意几个常见情态动词的意思和用法。

12．— __________I wear a tie to Janet's birthday party?

— No,you needn't. But do remember to bring her a present.

A. Must

B. Should

C. Need

D. 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。

13．—Mum, I play football this afternoon?

—Sure, but you finish your homework first.

A. may; could

B. can; must

C. can; mustn't

D. 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。

14．According to the law, traffic keep to the left in England.

A. may

B. must

C. need

D. can

【答案】 B

【解析】【分析】句意：根据法律规定，在英国车辆必须靠左形式。A.may可以，表示允许；B.must必须，表示要求；C.need需要，表示必要性；D.can能，表示能力。根据According to the law,可知法律的要求，应是必须的，应用must，故答案为B。

【点评】考查情态动词。掌握情态动词的常用法。

15．——Do you have any plans for this summer vacation? ——I'm not sure. I ___ take a trip to Taiwan.

A. must

B. need

C. may

D. 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。

16．— I take the magazine out of the reading room?

— I'm sorry you .

A. Could; couldn't

B. Must; couldn't

C. Will; can't

D. May; can't

【答案】 D

【解析】【分析】句意：——我可以把杂志带出阅览室吗？——对不起，你不能。could 能，可以；must必须；will将；may可以；can能，可以，can't不可以，不能。此处表示请求许可，用could或者may，由could或者may构成的一般疑问句，肯定回答用yes，主语+can，否定回答用sorry，主语+can't，结合选项，故答案选D。

【点评】考查情态动词的辨析。注意理解句意，理解选项，根据语境，选出正确的答案。

17．——You look pretty in green, Kate. ——Thank you. I like green. Green ______give me energy.

A. can

B. must

C. should

D. 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。

18．— _______ you play tennis?

—Yes, and I'm a good player.

A. Can

B. May

C. Must

D. 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。

19．Now all passengers show their ID cards and go through the safety check before they take a train.

A. would

B. may

C. could

D. must

【答案】 D

【解析】【分析】句意：现在所有的乘客必须出示身份证并通过安检，才能上火车。A.

愿，要;B.可以;C.可以，表示许可，可能，表示肯定的推测;D.must必须。旅客必须出示身份

证并通过安检才能上火车，必须:must。故选D。

20．—I think we need to sit down and have a talk. —I agree more. Let's take the bench

over there.

A. could

B. couldn't

C. should

D. shouldn't

【答案】B

【解析】【分析】试题分析:句意:一一我认为我们需要坐下来谈一谈。一一我完全同意。我

们到那边凳子上坐。I could agree more我可以同意更多的，I couldn't agree 我不同意I couldn’t agree more.我完全同意I should agree more.应该同意更多，I shouldn't agree more我

不应该同意更多.后句Let's take the bench over there.我们在那边的凳子上坐吧）可以推测

出，我同意。故选B。

21．You are supposed to bow when you meet someone from Korea.

A. must

B. should

C. would

D. can

【答案】 B

【解析】【分析】句意：当你遇到来自韩国的人时，你应该鞠躬。A. must必须，强调主观上的愿望；B. should应该，表示责任与义务；C. would要，将要；D. can能，会，表示能力。Be supposed to 表示“应该”，故选B。

【点评】本题考查情态动词词义辨析，以及must、should、would、can四个情态动词的词义和用法。

22．Size and type do not matter — you ______ do almost anything if you never give up. A. should B. must C. need D. can

【答案】 D

【解析】【分析】句意：大小和类型不重要——如果你不放弃，你几乎可以做任何事。A. should应该；B. must 必须； C. need 需要；D. can可以，能；根据 if you never give up，可知此处说你能做几乎任何事情，故选D。

【点评】此题考查情态动词辨析。根据上下文的联系确定所使用的情态动词。

23．—I've bought all the food for the party tonight.

—Thank you. Then I _______ go to the supermarket.

A. can't

B. mustn't

C. shouldn't

D. needn't

【答案】 D

【解析】【分析】句意：－今天晚上我买好了所有晚会的食物。－谢谢你。那么我就不必去超市了。A. can't不能；B. mustn't不准，不允许，禁止；C. shouldn't不应该；D. needn't 不必。你买好了，我就不必去买了。故选D。

【点评】考查情态动词，表示不必要应使用need的形式，要牢记不同的情态动词的意思。

24．—How amazing this robot is!

—Wow, it has video cameras in its eyes, so it “see” and interact with people.

A. may

B. can

C. must

D. should

【答案】 B

【解析】【分析】句意：—这个机器人多么惊人啊！—哇，在它的眼睛里有摄像机，因此它能看见和人打交道。A. may 可以，可能；表示许可，B. can 能；表示能力，C. must 必须；D. should应该；根据it has video cameras in its eyes,可知是有能力看见，故选B。

【点评】考查情态动词辨析。熟记情态动词的含义和用法。

25．— We've ordered too much food. I eat any more.

—Never mind. Let' take it home.

A. can't

B. mustn't

C. needn't

D. shouldn't

【答案】 A

【解析】【分析】句意：——我们已经点了太多的食物，我不能再吃了。——没关系，我们带回家吧。can't不能；mustn't必须不；一定不要；needn't不必；shouldn't不应该。根据句意可知选Ａ。

【点评】考查情态动词辨析。

26．—It's wonderful that our chairperson has been invited to the English party!

—I'm afraid he ______ come. He has been busy with his study these days.

A. needn't

B. mustn't

C. can't

D. couldn't

【答案】 C

【解析】【分析】句意：——很高兴我们的主席被邀请参加英语晚会！——恐怕他来不了。这些天他一直忙于学习。A 不必；B 一定不，C 不可能；D 不可能。由题干中的语句He has been busy with his study these days.提示可知，他不可能来，表示否定性的推测，要用can't，故选C。

【点评】考查情态动词的基本用法。注意情态动词表示推测时的具体规则。

27．—Must I practice the violin right now?

—No, you _____. You ______ do it later on.

A. mustn't; may

B. shouldn't; might

C. needn't; may

D. needn't; must

【答案】 C

【解析】【分析】句意：－我必须马上练习钢琴吗？－不，你不必。你可以等会儿练。mustn't：不准，不允许，禁止；shouldn't不应该；needn't不必；前句问“必须吗？”回答：不必：needn't；后句话“你可以等会儿练”，是表示许可的，may可以；must必须；might 可以。might为may的过去式，此处用现在，故选C。

【点评】本题考查情态动词的词义辨析。以及must、need、should、need、might、may几个词的词义和用法

28．— Must I study here with you, Mum?

—No, you ______.You may go home now, but you ______go to the net-bar.

A. must, need

B. need, must

C. needn't, mustn't

D. mustn't, needn't

【答案】 C

【解析】【分析】句意：——妈妈，我必须和你一起在这里学习吗？——不，你不需要了。你现在可以回家，但是你不可以去网吧。第一空，以must提问的一般疑问句，否定回答用needn't或don't/doesn't have to（不必）。根据No可知，用needn't，不需要；第二空，根据but可知，不允许去网吧，用mustn't。故选C。

【点评】考查情态动词辨析。注意must的一般疑问句的用法。

29．——Mum, the train is leaving in eight minutes. I go now.——Okay, Jim, call me when you get there.

A. may

B. must

C. can

【答案】B

【解析】【分析】句意:一妈妈，火车八分钟后出发，我现在必须走了。一好的，吉姆，到了给我电话。A.may可以，表示允许或请求许可;B. must必须，强调主观愿望;一定，表示肯定的推测。C. can能，表示主语所具备的能力。火车要出发了，我必须走了。表示必须:must，故选B。

30．The girl in the classroom_____ be Mary. She called me from Beijing just now.

A. mustn't

B. needn't

C. shouldn't

D. can't

【答案】D

【解析】【分析】句意:教室里的女孩不可能是玛丽。她刚才从北京给我打的电话。A.不准，不允许，禁止;B. 不必;C.不应该;D.不可能。后句句意可以堆测出玛丽不在教室，表示否定的推测，不可能，故选D。

31．— Is that Mr. Green?

— Impossible. He has gone to America. It be him.

A. could

B. must

C. can't

D. might

【答案】C

【解析】【分析】句意：——那是格林先生吗？——不可能，他去美国了。不可能是他。

A.could可能，表示对目前情况作的可能的推测；可以，表示委婉的语气；

B. must必须，强调主观的愿望；一定，表示对目前作的肯定推测；

C. can`t不能，表示能力；不可能，表示否定的推测；

D. might可能，表示可能的推测。根据句意，他去美国了，所以那不可能是格林先生。故选C。

32．You return the book now. You can keep it until next week if you like.

A. have to

B. can't

C. mustn't

D. needn't

【答案】 D

【解析】【分析】句意：你不必现在归还这本书，如果你喜欢，你可以到下周再还。have to必须；can't不能；mustn't不准，一定不要；needn't不必。根据You can keep it until next week if you like.（你可以到下周才还。），可知现在不必还，用needn't。故选D。

33．— Where did you put your schoolbag?

— I can't remember. I attended a concert yesterday so it still be in the music hall.

A. can't

B. need

C. might

D. must

【答案】 C

【解析】【分析】句意：一一你把你的书包放在哪儿了?一一我记不得了，我昨天出席了一个音乐会，因此它可能还在音乐厅里。A.can't 不能，表示能力;不可能，表示否定的推测;B.need 需要，必须;C. might可能，表示推测，可以，表示许可;D.must必须;一定，表示肯定的推测。我记不得了，因此在音乐厅只是一个可能情况，故选C。

34．—Could you please play tennis with me now?

—Sorry, I ________. I have to finish my homework first.

A. can't

B. couldn't

C. shouldn't

D. wouldn't

【答案】 A

【解析】【分析】句意：——请问，现在你能和我一起打网球吗？——对不起，我不能。我必须先完成作业。can't不可以，couldn't可能不，shouldn't不应该，wouldn't不愿意。根据Could you please……?表示请求，不同意，应说不可以，故答案选A。

【点评】考查情态动词，注意识记情态动词的用法和理解句意。

35．—1ook! It be David in the classroom.

—It be him. Because I saw him in the library a moment ago.

A. may; mustn't

B. must; can't

C. need; can't

D. mustn't; can 【答案】 B

【解析】【分析】句意：——看！教室里一定是大卫。——不可能是他。因为我刚才在图书馆见过他。 may可以；must必须，一定；can能，可能；need需要；can't 不可能，不可以；mustn't禁止。根据下文I saw him in the library a moment ago.可知不可能是David，要用can't；所以上文一定是肯定的猜测，要用must （be）。故选B。

【点评】考查情态动词表示猜测的用法。理解情态动词的词义和用法，根据语境，选择正确的情态动词。

36．Jenny is only eight years old, but she cook.

A. may

B. must

C. should

D. can

【答案】 D

【解析】【分析】句意：珍妮只有八岁，但她会做饭。A：may 可能；B：must必须；C： should应该； D： can会，能。根据Jenny is only eight years old,和连词but，表示与前句是转折关系，可知她能做饭，故选D。

【点评】考查情态动词辨析。理解情态动词词义和用法，根据语境选择正确的情态动词。

37．—Life is becoming convenient with the Internet.

—That's true! Almost everything ______ be done online.

A. must

B. could

C. should

D. can't

【答案】 B

【解析】【分析】句意：——生活正随着网络变得方便。——那是真的。几乎所有的事情可以在网上完成。A必须，B可以，C将，D不能。根据 Life is becoming convenient with the Internet. 生活正随着网络变得方便，可知应该是很多事情可以在网上完成，故选B。

【点评】考查情态动词。注意理解和掌握情态动词的不同用法。

38．Recently people in China ____take much money on shopping because they often use Alipay （支付宝）

A. needn't

B. mustn't

C. shouldn't

D. can't

【答案】 A

【解析】【分析】句意：最近中国人没必要购物带许多钱，因为他们经常使用支付宝。A.没必要；B.禁止；C.不应该；D.不可能。因为有支付宝，所以人们购物时没必要带许多钱，故选A。

【点评】考查情态动词辨析，注意平时识记其词义，理解句意。

39．Could you please speak a little louder? I ______ hear you very well.

A. can't

B. mustn't

C. shouldn't

D. needn't

【答案】 A

【解析】【分析】句意：请你说大点声好吗？我不能很好地听到你说的话。can't不能；mustn't禁止；不允许；shouldn't不应该；needn't不需要。根据语境表示“不能够”。故答案为A。

【点评】考查情态动词的辨析。

40．Mr. Zhang has gone to Mexico, so the man __________ be him.

A. must

B. might

C. can't

【答案】 C

【解析】【分析】句意：张先生去了墨西哥，所以那个男人不可能是他。A：must 一定，表示推测；B： might 可能；C： can't不可能，推测的否定。根据上文 Mr. Zhang has gone to Mexico 可知那个男人不可能是他。表示否定的推测，要用can't，故选C。

【点评】考查情态动词的辨析。根据语境选择正确的情态动词。

41．If you _______ the book, you _______ buy it right now, I think.

A. needn't; needn't

B. don't need; don't need

C. don't need; needn't

D. don't need; needn't to

【答案】 C

【解析】【分析】句意：如果你不需要这本书，我觉得现在你就没有必要买它。needn't是情态动词need的否定形式，后面跟动词原形；don't need是实意动词need的否定形式，后面跟to do sth.或者名词做宾语，根据句意可知应选C。

42．—___________ I bring you all the magazines right now?

— No, you don't have to, but you give them to me tomorrow.

A. May, can

B. Should, must

C. Can, can

D. Must, had better

【答案】 D

【解析】【分析】句意为：—我必须给你马上把所有的杂志都拿来吗？—不，不必。但是

你最好明天给我。Can表示能够，may表示可能，should表示应该，must表示必须，had better表示最好做某事。根据语境可知，这里表示必须，不得不，并建议作某事，结合选

项可知应选D

【点评】本题考查情态动词辨析。以及may、should、can、must、had better五个词的词

意和用法。

43．—That must be Mr. John.

—No, it be him. I saw him off at the airport half an hour ago.

A. may not

B. mustn't

C. can't

D. needn't

【答案】 C

【解析】【分析】句意：——那一定是约翰先生。——不，不可能是他。我看见他在半小

时前到达机场。nay not可能不是；mustn't一定不是；can't不可能是；needn't不必，英语

中，肯定的推测用must；否定的推测用can't。依据 I saw him off at the airport half an hour ago. 可知不可能是他，所以应该是否定的推测，故选C。

【点评】此题考查情态动词。弄清每个情态动词的使用规则。根据语境和上下文的联系确

定所使用的情态动词。

44．—I missed last night's Everlasting Classics（《经典咏流传》）！

—You care. You can watch it online later.

A. mustn't

B. can't

C. may not

D. needn't

【答案】 D

【解析】【分析】句意：——我错过了昨晚的《经典咏流传》！——你不必在意，以后你

可以上网看。A. mustn't不允许；B.can't不能； C. may not可能不； D. needn't不必。根据

You can watch it online later. "可知，此处意思是你不必在意。故选D。

【点评】考查情态动词。弄清每个情态动词的使用规则。

45．He _________ work on the farm every day. I'm sure about that because his skin is very black.

A. can't

B. may

C. must

D. couldn't

【答案】 C

【解析】【分析】句意：他一定每天在农场工作，我敢肯定，因为他的皮肤很黑。A. can't

不可能，对事情表示否定推测；B. may可以，可能；C. must一定、必须，表示非常肯定的

推测；D. couldn't不能。根据I'm sure about that because his skin is very black.可知他是在农

场上工作，此处表示肯定的推测，故选C。

【点评】此题考查情态动词。要掌握每个情态动词的使用方法。

46．— _________ I take my cousin Shirley with us, Mr. Wu？

— Yes, but we'll get there by bike. ____________ she ride a bike?

— Yes, and she ___________ ride a bike when she was only six years old.

A. Could; can; could

B. Can; can; can

C. Can; could; could

D. Could; could; can

【答案】 A

【解析】【分析】句意：-我能带我表弟雪莉和我们一起吗，吴先生？-是的，但我们将骑

自行车去那儿。她会骑自行车吗？-是的，她在六岁时就能骑自行车了。can，能，会，它

的过去式是could。在一般疑问句中could多表示委婉语气，而不是表过去。所以选A。

47．You _____ walk too close to the edge of the path because you might fall and hurt yourself.

A. may

B. might

C. needn't

D. musn't

【答案】 D

【解析】【分析】句意：你不能走得太靠近路的边缘，因为你可能跌倒伤害自己。A. may

可以，表允许；B. might可能，表推测；C. needn't不必，指没有必要；D. musn't不能，表

示不允许或禁止。根据句意语境，本句是不允许离路边太近，故选D。

【点评】考查情态动词辨析题。注意分析句意和词义。

48．—Where is George?

—He _______ be here just now. His coffee is still warm.

A. need

B. can't

C. must

D. shouldn't

【答案】 C

【解析】【分析】句意：——乔治在哪里？——他刚才一定在这里，他的咖啡还是热的。A. need需要； B. can't 不能，不可能（表示推测）； C. must 必须，一定（表示推测）； D. shouldn't不应该；根据His coffee is still warm.可知表示肯定推测一定在这儿；故

答案为C。

【点评】考查情态动词。掌握情态动词表推测时的意义和用法。

49．— Sorry, I forgot to take money with me. Maybe I can't buy the book you like.

— Mum, you ______ worry about it. We can pay by Alipay （支付宝）.

A. can't

B. needn't

C. mustn't

D. shouldn't

【答案】 B

【解析】【分析】句意：——对不起，我忘记带钱了。也许我不能买你喜欢的书。——妈妈，你不用担心。我们可以用支付宝支付。A. can't不能，指不允许或否定推测；B. needn't

不需，指没必要；C. mustn't不能，表禁止；D. shouldn't不应该，表建议。根据句意语境，

本句是说妈妈不需要担心，故答案为B。

【点评】考查情态动词。理解句意并掌握情态动词的意义和用法区别。

50．—Must I go out to have dinner with you, Mum?

—No, you , my dear. You're free to make your own decision.

A. shouldn't

B. mustn't

C. needn't

D. can't

【答案】 C

【解析】【分析】句意：——妈妈，我必须跟你出去吃饭吗？——不，你不必，亲爱的。你可以自由作出你的决定。问句是must 构成的一般疑问句，根据no，可知是否定回答，must的否定回答应会使用 needn 't，故答案是C。

【点评】考查情态动词needn't的用法，注意must构成的一般疑问句的否定回答。

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