7.答案:C

解析:"shouldn't+ have + 过去分词" 表示过去发生的事,意思是"本来不该做而做了……".just now是表示过去的时间状语.

6.答案:B

解析:may 用来征得对方的同意.May I have a look 我可以看看吗 shall 用于问句中表示征求对方意见.想看别人的东西要征得对方同意,所以,shall 不能作为答案.

5.答案:D

解析:shall 用于陈述句的第二,第三人称时,表示说话人的意图,允诺,警告,命令,决心等,意思是"必须,应,可".据宣布,考生在收卷前必须坐在自己的座位上.

4.答案:C

解析:couldn't be true表示不可能.所提供的情境there was little snow说明对方所说的去山里滑雪这件事是不可能的.

3.答案:D

解析:may可能.所提供的情境He likes driving his car.,John既可能乘火车来,也可能自己开车来.

2.答案:C

解析:could have taken表示对过去情况的推断,可能是谁把它拿走了.should have + 过去分词表示本来应该做而没有做;must have + 过去分词表示(过去)一定那样做了;would have +过去分词常用于表示虚拟语气.

1.答案:B

解析:shall用于一般疑问句时表示征求对方意见.我们打扫一下好吗

25.(1994上海, 11) Michael _______ be a policeman, for he is much too short.

A.needn''t

C.should D.may

●答案解析

24.(NMET 1994, 16) I told Sally how to get here, but perhaps I _______ for her.

A.had to write it out B.must have written it out

C.should have written it out D.ought to write it out

23.(1995上海, 27) I wonder how he _______ that to the teacher.

A.dare to say B.dare saying

C.not dare say D.dared say