Ⅰ.单项填空
1.—I didn't go to work yesterday because my car broke down.
—You ________ mine. I wasn't using it then.
A.might borrow
B.should borrow
C.must have borrowed
D.could have borrowed
答案：D 考查情态动词+have done。句意：——由于我的车坏了，昨天我没有去上班。——你本来能够用我的车，当时我并不用车。事情发生在过去，could have done本来能够做……，暗含实际上没有做。must have done一定做了某事。结合句意选D。
2.Sometimes his present job________ be boring, and he ________ work for long hours a day.
A.can; has to B.may; can
C.has to; may D.ought to; must
答案：A 句意：有时他现在的工作有可能很没趣，并且他一天中还必须工作很长时间。can表示事情一时的可能性;have to必须，不得不。
3.We are given a special holiday, so we ________ go to work tomorrow.
A.can't B.mustn't
C.needn't D.shouldn't
答案：C 句意：我们有个特别的假期，所以我们明天不必去上班。can't不可能;mustn't绝不可以;needn't不必;shouldn't不应该。结合句意选C。
4.(2014·银川高一检测)—Sorry, Professor Smith. I didn't finish the paper yesterday.
—Oh, you ________ have done it as yesterday was the deadline.
A.must B.mustn't
C.should D.shouldn't
答案：C 答语句意：哦，你本该做完的，因为昨天就是最后期限。此处用should have done表示本该做某事而实际上未做。
5.—What do you think we can do for our aged parents?
—You ________ do anything except to be with them and be yourself.
A.don't have to B.oughtn't to
C.mustn't D.can't
答案：A 句意：——你认为我们能为我们年老的父母做什么?——除了陪伴他们及顺其自然你不必做任何事。don't have to不必;oughtn't to不应该;mustn't绝不可以;can't不可能。结合句意选A。
6.(2014·长春高一检测)—I didn't see her last night at the party.
—You ________. But you came too late.
A.could have B.can't have
C.must have D.ought have
答案：A 句意：——我昨天晚上在聚会上没见到她。——你本能见到她的。但是你来得太晚了。此题考查could have done，过去分词已省去。could have done表示“过去本来可以做某事，但实际上没有做”。
7.—Must I return the book a week later?
—Oh, no.You ________.
A.oughtn't to B.can't
C.won't D.needn't
答案：D 句意：——我必须一周后还这本书吗?——哦，不，不必。must的疑问句的否定回答用needn't或don't have to。
8.—She looks unhappy.________ anything have happened to her?
—I'm not sure, but I guess something ________ happened.
A.May;must have B.Can;may have
C.Must; may D.Should; might have
答案：B 句意：——她看起来不高兴。她可能出了什么事吗?——我不确定，但我想可能出了什么事。can have done可能做了某事，用于疑问句或否定句;may have done可能做了某事，表示把握较小的推测，用于肯定句。
9.(2013·辽宁高考)Harry is feeling uncomfortable.He ________ too much at the party last night.
A.could drink B.should drink
C.would have drunk D.must have drunk
答案：D 考查情态动词的用法。句意：Harry感到不舒服。他一定是在昨晚的聚会上喝了太多的酒。由第一句中的“uncomfortable”及第二句中的时间状语“last night”提示，此处强调对过去发生动作的推测。用must have done。
