1.I thought you ______ like something to read, so I have bought you some books.
2.You _______ return the book now. You can keep it till next week if you like.
3.Where is my pen I ______ it.
B.would have lost
C.should have lost
D.must have lost
4.I didn't hear the phone. I_______asleep.
B.must have been
D.should have been
5.He______you more help. Even though he was very busy.
A.might have given
C.may have given
6.A computer______think for itself; it must be told what to do.
7.Jenny______have kept her word. I wonder why she changed her mind.
8.----Could I borrow your dictionary
----Yes, of course you_______.
9.We_______last night, but we went to the concert instead.
A.must have studied
C.should have studied
10.Applicants(申请者)_______have finished the middle school.
11.----Shall I tell John about it
----No, you _______. I've told him already.
12.There was plenty of time. She_______.
A.mustn't have hurried
B.couldn't have hurried
C.must not hurry
D.needn't have hurried.
13.The plant is dead. I_______it more water.
B.would have given
D.should have given
14.I searched for my wallet and it wasn't there. At first, I thought I________it at home. Then I remembered_______it out to pay for the taxi.
A.must have left, to take
B.may leave, taking
C.might leave. To take
D.could have left, taking
15.----That must be a mistake.
----No, it______a mistake
A.must not be
16.Man_______die without air or water.