2011年高考英语精编陷阱题训练(九)（附答案）

 

 

2011年高考英语精编陷阱题训练(九)（附答案）

1. We’re so busy that no one in the office can _____ for any other work.

A. spare                                                   B. be spared

C. share                                                   D. be shared

2. He regards that book _____ one of the worst that he’s _____ read.

A. to be, ever                                            B. to be, never

C. as, ever                                                D. as, never

3. “Did you get a job?” “No, I ______, but it’s no use.”

A. expected                                              B. tried to

C. managed to                                           D. planned

4. “Do you know that Jack ______ a postman for about six years?” “Yes, I see.”

A. has become                                          B. has turned

C. has changed                                         D. has been

5. The thing that ______ is not whether you fail or not, but whether you try or not.

A. matters                                                B. cares

C. considers                                             D. minds

6. I don’t want the green coat. It is red and black colours that ______ me very well.

A. suit                                                      B. fit

C. suits                                                    D. fits

7. “Will another fifty be enough?” “Just twenty will ______.”

A. work                                                   B. do

C. suit                                                      D. fit

8. Goodbye, Mr Carter — my secretary will _____ you to the door.

A. send                                                    B. lead

C. drive                                                    D. show

9. This kind of cancer can be cured, provided it is ______ early.

A. got                                                      B. gained

C. seen                                                     D. caught

10. We haven’t enough books for everyone; some of you will have to _____.

A. help                                                     B. enjoy

C. share                                                   D. spare

11. He asked her to marry him and she _____ him.

A. answered                                             B. received

C. accepted                                              D. agreed

12. My worst fears were _____ when I saw what the exam questions were.

A. done                                                    B. seen

C. finished                                                D. realized

13. The plan looks good on paper, but will it _____?

A. work                                                   B. pass

C. agree                                                   D. does

14. What’s the matter with the radio? Why isn’t it _____?

A. broadcasting                                         B. working

C. doing                                                   D. sounding

15. High unemployment _____ the government billions of pounds in lost taxes.

A. spends                                                 B. takes

C. uses                                                     D. costs

16. It’s hard to rescue drowning people because they _____ so much.

A. sink                                                     B. swim

C. jump                                                    D. struggle

17. She went to the station to meet her husband, but _____ him in the crowd.

A. passed                                                 B. recognized

C. missed                                                 D. lost

18. I missed what was happening because I wasn’t ______ very closely.

A. noticing                                                B. running

C. watching                                              D. glancing

19. If you lend me a pound, it will _____ me having to go to the bank.

A. save                                                     B. share

C. serve                                                   D. help

20. Don’t _______ your breath trying to persuade them; they’ll never listen.

A. use                                                      B. waste

C. spend                                                   D. put

21. He has spent little time on his lessons this term, so he _____ to fail the exam.

A. expects                                                B. hopes

C. wishes                                                 D. requires

22. He will never ______ anything if he doesn’t work hard.

A. hope                                                    B. wish

C. achieve                                                D. succeed

【答案与解析】

1. 选B，spare 在表示“腾出或省去（多余的人或物）”。

2. 选C，regard … as …的意思“把……当作……”，其中的介词 as 不能换成 to be。

3. 选B。I tried to 为 I tried to get a job 之省略。

4. 选D。因为A、B、C均为终止性动词，均不能连用 for about six years 这样的一段时间。

5. 选A。matter 在此的意思是“要紧”、“关系重大”。

6. 选A。填空句为强调句，强调主语 red and black colours，故其后的谓语要用复数，即排除C和D。另外，fit 与suit区别是：fit 表示“适合”或“合身”等(及物或不及物)，主要是指尺寸、大小、形状等方面的适合，而 suit 表示“适合”，主要指款式或花色等方面的适合。

7. 选B。do 在此表示“够”、“足够”、“适合”、“行”、“可以”等义。又如：

This will never do! 这事永远不可以。

I’m hungry. Get me something to eat. Anything will do. 我饿了，给我弄点吃的东西，什么都行。

8. 选D。show sb to the door 意为“送某人到门口”。注意，其中的介词 to 不可省略，否则就成了 show sb the door（驱赶某人，下逐客令）。另外，也不要按汉语意思选A，因为send 通常表示派人送，而不表示亲自送。

9. 选D，catch 在此表示“发现”，句中的 provided 用作连词，意为“如果”。

10. 选C。既然书不够，不能每人一本，所以有些人只能share(分享)了。

11. 选C。accept 意为“同意”、“接受”，注意不能选D，因为 agree 后不能直接跟名词或代词作宾语。

12. 选D。realize 在此的意思不是“实现”，而是指“使(不安、恐惧等)成为事实”。

13. 选A，work 在此的意思是“起作用”、“奏效”。

14. 选B。work 在此的意思是“运作”、“运转”。

15. 选D。spend 和 cost 均可表示“花费”，但句型不同：spend + 时间或金钱 + on sth (in doing sth)，cost + 某人或某机构 + 金钱或时间。

16. 选D。由句意和常识推知。

17. 选C。miss 指“错过”。

18. 选C，由句子的语境可推知。

19. 选A，save 指“省去(劳力等)”。

20. 选B。

21. 选A，expects 在此不是表示“期待”，而是表示“预料”。

22. 选C，achieve 意为“完成”、“做到”。其余三项均不能直接跟名词或代词作宾语。

短语动词考点

◆典型陷阱题分析◆

1. When he realized the police had seen him, the man ______ the exit as quickly as possible.

A. made off                                              B. made for

C. made out                                              D. made up

【陷阱】容易误选A。

【分析】正确答案应选B。make for 意为“移向，走向”。最具干扰性的选项是A，因为make off 的意思是“匆匆逃走”。之所以不能选A，是因为 make off 不及物，其后不能接宾语；而 make for 是及物的，其后可以接宾语。另外两个选项的意思是：make out 指“勉强了解，开出(支票等)，成功”；make up 指“弥补，虚构，整理，编辑，化妆”。

2. Now and then they would  ______ our house and have a talk with us.

A. call on                                                  B. drop in at

C. drop in on                                            D. drop in

【陷阱】几个干扰项均容易误选。

【分析】答案应选B。drop in 意为“顺便走访，不预先通知的拜访”，为不及物动词，其后不接宾语，若要接宾语，遵循以下原则：表示拜访某人，后接介词on；表示拜访某地，后接介词at。call 表示“拜访”时也遵循以上原则，即 call at 后接地点，call on 后接人。

3. “Why didn’t you write?” “My ink has _______.”

A. used up                                                B. run out of

C. given away                                           D. given out

【陷阱】几个干扰项均容易误选。

【分析】最佳答案为D。give out 有很多意思，如表示“分发，发出(气味、热等)，发表，用尽，精疲力竭”等，此题取其“用尽”之义。选项A和B很具干扰性，它们均可表示“用完，用尽”，但是它们是及物的，其后应接宾语。假若将选项A改为been used up 也可以选。

4. I think your health will soon ______ if you have a holiday on the seaside.

A. give up                                                 B. pick up

C. take up                                                 D. get up

【陷阱】几个干扰项均容易误选。

【分析】答案选B。pick up 的意思很多，其中一个用法是表示“恢复，改进，改善”。如：

The weather may pick up. 天气会好转的。

Business is picking up again. 生意又有所好转。

除此之处还可表示“拿起，捡起；收拾，整理；学会，获得；(用车)来接，去取；重新开始，继续；感染(疾病、坏习惯等)”等。

其他几个选项的意思分别为：give up 意为“放弃”；take up 意为“开始(学习或从事等)，继续，占去，接纳，提出”；get up 意为“起床”。

◆精编陷阱题训练◆

1. To our surprise the stranger _____ to be an old friend of my mother’s.

A. turned out                                            B. turned up

C. set out                                                 D. set up

2. All the girls swam in the lake except two, who _____ halfway.

A. gave off                                               B. gave up

C. gave away                                            D. gave out

3. If the new arrangement doesn’t _____, we’ll go back to the old one.

A. work over                                            B. work out

C. work up                                               D. work in

4. “Have great changes taken place in your village?” “Yes, A new school was ______ in the village last year.”

A. held up                                                 B. set up

C. sent up                                                 D. brought up

5. I had to ______ because someone else wanted to use the phone.

A. give up                                                 B. put up

C. hang up                                                D. ring up

6. Elephants would ______ if men were allowed to shoot as many as they wished.

A. die down                                              B. die out

C. die away                                              D. die off

7. My study of biology has ___C___ much of my spare time, but it has given me a great deal of enjoyment.

A. taken off                                              B. taken down

C. taken up                                               D. taken away

8. The plan    ___ just because people were unwilling to co-operate(合作).

A. broke down                                          B. pulled down

C. turned down                                         D. put down

9. The government has _______ the parents to work with teachers in the education of their children.

A. asked for                                              B. called for

C. looked for                                            D. paid for

10. John has put on so much weight recently that his mother has to ______ all his trousers to his measure.

A. let out                                                  B. give away

C. bring in                                                D. make up

11. I can ______ some noise while I’m studying, but I can’t stand very loud noise.

A. put up with                                           B. get rid of

C. have effect on                                       D. keep away from

12. The mother often tells her son to be a good boy, warning him to ______ trouble.

A. hold back from                                     B. keep out of

C. break away from                                   D. get rid of

13. To my surprise, the manager ______ 30 dollars from my salary without any good reason.

A. cut off                                                 B. held up

C. brought down                                       D. kept back

14. Steven has a lot of work to _______ in the office since he has been away for quite a few days.

A. take up                                                 B. make up

C. work out                                              D. carry out

15. Although Jane agrees with me on most points, there was one on which she was unwilling to _______.

A. give out                                                B. give in

C. give away                                             D. give off

16. You should ______ what your parents expect of you.

A. live up to                                              B. stand up to

C. look up to                                             D. run up to

17. I can hardly believe my eyes. What a poor composition you have _______. There are so many wrong spellings in it. 

A. turned into                                            B. turned off

C. turned to                                              D. turned in

18. “Why don’t we go for a picnic this weekend?” “Good idea! I would ______ the car and you’ll prepare the food.”

A. look after                                             B. take care of

C. see about                                              D get down to

19. How I wish that I could ______ my ideas in simple and wonderful English when chatting on the net.

A. set out                                                 B. set off

C. set over                                                D. set up

20. Some kinds of animals can _______ the colour of their surroundings.

A. take on                                                 B. dress up

C. put on                                                  D. get into

【答案与解析】

1. 选A。turn out 意为“结果是，原来是”等；turn up 意为“找到， 发现，出现，开大音量”等；set out 意为“开始，出发，陈述”等；set up 意为“设立，竖立，架起，升起，创(纪录)，提出”等。

2. 选B。give up 意为“放弃”；give out 意为“分发，发出(气味、热等)，发表，用尽，精疲力竭”；give away意为“送掉，分发，放弃，泄露，出卖”；give off 意为“发出(蒸汽、光等)，长出（枝、杈等）”。

3. 选B。work out 在此表示“有预期结果”；work over 意为“调查，重做”；work up 意为“逐步建立，逐步发展”；work in 意为“配合，引进”。

4. 选B。set up 意为“建立”；hold up 意为“举起，支撑，继续下去，阻挡，拦截”；send up 意为“发出，射出，长出，使上升”；bring up 意为“教育，培养，提出”。

5. 选C。give up 指“放弃”，put up 指“举起，架起，修建，张贴”等，hang up 指“挂断(电话)”，ring up 指“给某人打电话”。

6. 选B。die away 指“(声音、风、光线等)渐息，渐弱”；die down 指“(慢慢)熄灭，平静下来”；die off 指“一个一个地死去”；die out 指“(家族、种族、习俗、观念等)灭绝，绝迹”。

7. 选C。take up 意为“开始(学习或从事等)，继续，占去，接纳，提出”；take off意为“脱下，起飞，打折，请假”；take away 意为“取走”；take down 意为“写下，拆下”。

8. 选A。break down意为“中止，毁掉，压倒，停顿，倒塌”；pull down 意为“摧毁，推翻，使降低，使身体变差”；turn down 意为“拒绝，关小音量，减弱，降低”；put down 意为“放下，拒绝，镇压，削减，记下”。

9. 选B。call for 意为“要求，提倡”；ask for 意为“请求，索要”；look for 意为“寻找”；pay for 意为“为……付钱”。

10. 选A。let out 意为“放掉，泄露，放大，出租”；give away 意为“送掉，分发，放弃，泄露, 出卖，让步”；bring in 意为“生产， 挣得，介绍引进”；make up 意为“弥补，虚构，缝制，整理，和解，编辑，化妆”。

11. 选A。put up with 意为“忍受，容忍”；get rid of 意为“摆脱，消除，去掉”；have effect on 意为“对……有影响”；keep away from意为“远离，不接近”。

12. 选B。hold back from 意为“向……隐瞒”；keep out of 意为“使在……之外”；break away from 意为“脱离”；get rid of 意为“摆脱，消除，去掉”。

13. 选D。keep back 意为“扣下，留下，阻挡，隐瞒”；hold up意为“举起，支撑”；bring down 意为“打倒，击落，打死，降低”；cut off 意为“切断，断绝”。

14. 选B。make up 意为“弥补，虚构，整理，编辑，化妆”；take up 意为“拿起，开始从事，继续，吸收”；work out 意为“计算出，设计出，有预期结果”；carry out 意为“完成，实现，贯彻，执行”。

15. 选B。give in 意为“让步，屈服，上交”；give away 意为“分发，赠送，背弃，出卖，泄漏”； give off 意为“发出(光、热、声音、气味等)”；give out 意为“分发，散发，用完，耗尽，垮掉，失灵，出故障，发表，公布，发出(热、声音、信号等)”。

16. 选A。live up to 意为“实践，做到”；stand up to 意为“勇敢地抵抗”；look up to 意为“尊敬，仰望”；run up to 意为“达到，积累到”。

17. 选D。turn in 意为“上交，归还”；turn into 意为“进入，(使)变成”；turn to 意为“转向，变成，求助于，致力于”；turn off 意为“关掉，避开”。

18. 选C。see about 意为“查询，留意于”；look after和take careof均表示为“照顾，关心”；get down to 意为“开始认真考虑”。

19. 选A。set out 意为“陈述，陈列，出发，开始”；set off 意为“出发，动身”；set over 意为“移交，置于……上，指派……管理”；set up意为“设立，竖立，架起，升起，创(纪录)，提出”。

20. 选A。take on 意为“披上，呈现，具有，雇用，接纳，流行”；dress up 意为“打扮，装饰，伪装”；put on 意为“穿上，把……放在上，装出，增加”；get into意为“进入，陷入，穿上”。

情态动词考点

◆典型陷阱题分析◆

1. “Mike is often absent from class.” “Tell him he _____ answer for it if he goes on behaving like that.”

A. shall                                                     B. will

C. would                                                  D. can

【陷阱】几个干扰项均有可能误选。

【分析】最佳答案选A。shall 用作情态动词主要有以下两个用法：

(1) 用于疑问句中征求意见。如：

Shall I help you? 要不要我帮帮你?

Shall I open the window? 要我把窗子打开吗？

(2) 用于陈述句中表示允诺、告诫、警告、威胁、命令、规定、必然性等(可用于各类人称)。如：

You shall suffer for this. 你会为此事吃苦头的。(表威胁)

Each competitor shall wear a number. 每个参赛者要戴一个号码。(表规定)

You shall hear everything as soon as you come. 你一来就可听到所有情况了。(表允诺)

请做以下试题(答案均选 shall)：

(1) “I promise that she _____ get a nice present on her birthday.” “Will it be a great surprise to her?”

A. should                                                  B. must

C. would                                                  D. shall

2. You _______ pay too much attention to your reading skill, as it is so important.

A. cannot                                                 B. shouldn’t

C. mustn’t                                                D. needn’t

【陷阱】几个干扰项均有可能误选。

【分析】最佳答案选A。cannot…too…是英语中一个十分有用的表达，意为“不可能太……，无论怎样……也不算过分，越……越……”。如：

You can’t be too careful. 你越仔细越好。

You can’t praise the too much. 这本书值得大加赞扬。

We cannot work too much for the people. 我们为人民做工作是不可能做过头的。

A woman cannot have too many clothes. 女人买的衣服再多也不算多。

注：有时也可用 can never, impossible 等与too连用来表示类似意思。如：

It is impossible to get there too soon. 去那儿越早越好。

3. “Is John coming by train?” “He should, but he _____ not. He likes driving his car.”

A. must                                                    B. can

C. need                                                    D. may

【陷阱】可能误选B或C。

【分析】最佳答案为D。may 表推测，may not 意为“可能不(会坐火车来)”。句中的 He should 为 He should come by train 之省略，由于其后出现转折连词 but，说明语意有变化，再结合下文的 He likes driving his car，便可决定此题选D。注意，不能选B，因为can表示推测时通常不用肯定陈述句。

4. “I heard they went skiing in the mountains last winter.” “It ____ true because there was little snow there.”

A. may not be                                           B. won’t be

C. couldn’t be                                           D. mustn’t be

【陷阱】几个干扰项均有可能误选。

【分析】此题最佳答案为C，主要由下文的 because there was little snow there 这一语境所决定，既然“没下什么雪”，那么“滑雪”就应是“不可能”，所以选 couldn’t be，即选C。

5. “Do you think he is lazy?” “I _____ so once, but I don’t now.”

A. may have thought                                  B. can have thought

C. may think                                             D. might think

答案选A。从答话人的语境可知，空格处的意思“曾经这样想过”，即对过去情况作推测，故应用“情态动词+动词完成式”；又因为 can 表推测不用于肯定句，故选A。请看类例：

Their answers are exactly the same — one of them ______ from the other.

A. must copy                                            B. must have copied

C. should copy                                          D. should have copied

答案选B，既然两人的答案完全一样，说明“抄袭”已经发生，故用“情态动词+动词完成式”，根据句意，应选B而不能选D。

6. You _____ be right, but I don’t think you are.

A. can      B. could       C. must       D. should

【陷阱】几个干扰项均有可能误选。

【分析】从语境上看，C、D不宜选，在剩下的A和B中，许多同学想当然地选了A，认为整个句子为现在时态，所以选can，而不选过去式 could，但是最佳答案却是B而不是A。按照英语语法，情态动词can 用于推测表示可能性时，通常只用于否定句或疑问句中，而不用于肯定句中；但 could 用于表推测时，却不仅可用于否定句和疑问句，也可用于肯定句，且此时的 could 并不是 can 的过去式，与 can 也没有时间上的差别，只是 could 比 can语气更委婉，所以答案选B。注：can 在以下特殊情况下，也可用于肯定句。一是表示抽象的可能性，即从理论上或逻辑上分析是可能的，但是实际上未必会发生。如：Anyone can make mistakes. 任何人都可能会犯错误。二是后接“be (get, seem, become)＋形容词”，表示“有时会”、“时常会”等。如：My father can be very unreasonable. 我父亲有时候很不讲道理。

 

◆精编陷阱题训练◆

1. “I thought you wouldn’t mind.” “Well, as a matter of fact I don’t, but you _____ me first.”

A. should ask                                            B. should have asked

C. must ask                                              D. must have asked

2. “I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”

A. must be                                                B. must have been

C. might be                                               D. can have been

3. That car nearly hit me; I ______.

A. might be killed                                      B. might have been killed

C. may be killed                                        D. may been killed

4. It’s a very kind offer, but I really _____ accept it.

A. mustn’t                                                B. needn’t

C. can’t                                                    D. don’t

5. The police still haven’t found her, but they’re doing all they _____.

A. may                                                     B. can

C. must                                                    D. will

6. You _____ practise the drums while the baby is sleeping.

A. needn’t                                                B. mightn’t

C. mustn’t                                                D. won’t

7. You _____ him the news; he knew it already.

A. needn’t tell                                           B. needn’t have told

C. mightn’t tell                                          D. mightn’t have told

8. As she’s not here, I suppose she _____ home.

A. must go                                               B. must have gone

C. might go                                              D. might be going

9. Are you still here? You ______ home hours ago.

A. should go                                             B. should have gone

C. might go                                              D. may have gone

10. “I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”

A. must be                                                B. must have been

C. might be                                               D. can have been

11. I _______ have met him a long time ago. Both his name and face are very familiar.

A. may                                                     B. can

C. would                                                  D. should

13.                                                           “Shall we go shopping?” “Sorry, we _______ buy anything now because none of the shops are open.”

A. mustn’t　　                                         B. needn’t

C. can’t                                                    　　　　　　       D. shouldn’t

14. They often go to the restaurants for meals. They _____ be very poor.

A. mustn’t                                                B. can’t

C. may not                                               D. needn’t

15. I didn’t see her in the meeting room this morning. She ______ have spoken at the meeting.

A. mustn’t                                                B. shouldn’t

C. needn’t                                                D. couldn’t

17. He ______ the test again, in which case, his mother will be very disappointed. 

A. might fail                                              B. must have failed

C. should fail                                            D. could have failed

18. “Why didn’t she come to the meeting yesterday?” “I’m not so sure. She ______ ill.”

A. should be                                             B. should have been

C. must be                                                D. might have been

19. Why did you just sit and watch? You _______ me.

A. could help                                            B. should help

C. could have helped                                  D. must have helped

20. “You ______ your teacher for help. He is kind-hearted.” “Yes. A whole day _______.”

A. can ask, will waste

B. must have asked, had wasted

C. could have asked, was wasted

D. shouldn’t have asked, would be wasted

21. “Is there a flight to London this evening?” “There _______ be. I’ll phone the airport and find it out.”

A. must                                                    B. might

C. would                                                  D. can

22. “Show me your permit, please.” “Oh, it’s not in my pocket. It ______.”

A. might fall out                                        B. could fall out

C. should have fallen out                            D. must have fallen out

23. “Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”

A. must; could                                          B. may; might

C. need; must                                           D. could; need

25. “Did Jim come?” “I don’t know. He _______ while I was out.”

A. might have come                                   B. might come

C. mush have come                                   D. should have come

【答案与解析】

1. 选B，should 后接动词完成式表示“本来应该做某事，结果未做”，此处含有责备之意。

2. 选B，对过去情况的肯定推测，宜用“情态动词 + 动词完成式”，再根据句意，可确定答案为B。注：can 表示推测通常不用于肯定陈述句。

3. 选B，表示过去可能发生而实际上未发生的事，用might + 动词完成式。若只是推测过去可能已经发生的事，则可用  may [might] + 动词完成式，如 He may [might] have gone. 他可能已经走了。

4. 选C。由句意可知。

5. 选B，do all one can 意为“尽力”或“竭尽全力”。

6. 选C，mustn’t 在此相当于 can’t，且语气更强。

7. 选B，“needn’t + 动词完成式”的意思是：本来不必做某事，但实际上做了。上句意思是“你本来不必告诉他这个消息的，因为他(当时)已经知道了”。注意，句中 knew 为过去式。

8. 选B，must 后接动词完成式表示对过去情况的肯定推测，意为“一定已经做了某事”。

9. 选B，should 后接动词完成式表示“本来应该做某事，结果未做”。

10. 选B，对过去情况的肯定推测，宜用“情态动词 + 动词完成式”，再根据句意，可确定答案为B。注：can 表示推测通常不用于肯定句。

12. 选A。may have done sth 表示对过去可能发生的事进行推测，意为“可能曾经”。

13. 选C。根据上下文的语境推知。can’t 意为“不能”。

14. 选B。根据上下文的语境推知。can’t 表推测，意为“不不能”。

16. 选D。couldn’t have done sth 表示对过去情况进行推测，意为“过去不可能发生过某情况”。

17. 选A。根据下文的 will be 可知，“他考试再不及格”是将来的事，据此可排除B和D。再根据语意，排除C。

18. 选D。从时间上看，由于是昨天没来开会，所以推测他生病也应指昨天，故排除A和C。从语境上看，既然上文说 I’m not so sure，那么说明说话者对自己的推测没有很大把握，故选D。

19. 选C。根据上文的过去时态可知，此句谈的是过去的事，故排除A和C。根据语境排除D。

20. 选C。couldn’t have done sth 结构在此表示责备，指过去本来可以做某事但实际上未做。第二空填 was wasted，陈述的是过去的一事实。

21. 选B。根据下文的 I’ll phone the airport and find it out 可知，说话人对自己的推测没有很大把握，故选 might。若选A，语气太强，不合语境；若选D，不合语法习惯，因为can 表推测通常不用于肯定陈述句中。

22. 选D。既然“通行证现在不在口袋里”，那么它“掉出去”应发生在过去，故排除A和B。比较选项C和D所表示的意思，选D更恰当。

24. 选A。根据 Don’t be so sure 可知前面一空应填must。第二空填的could表示推测，虽为过去式形式，但表示现在意义，语气较委婉，它与表推测的 can 主要用于否定句和疑问句不同，它可以用于肯定陈述句。

25. 选A。根据句中有关时态可知“他来”发生在过去，故排除B；根据 I don’t know 可知选项C语气太肯定，不合适；选项D的意思是“本来应该来”，与语境不合。