— The woman biologist stayed in Africa studying wild animals for 13 years before she returned.

— Oh, dear! She ______ a lot of difficulties!

A. may go through                  B. might go through

C. ought to have gone through         D. must have gone through

 John, look at the time. ______ you play the piano at such a late hour ?

A. Must      B. Can        C. May       D. Need

 It is hard for me to imagine what I would be doing today if I _______ in love at the age of seven, with the Melinda Cox Library in my hometown.

A. wouldn’t have fallen      B. had not fallen       C. should fall      D. were to fall

 — Are you still going to Shanghai for the Spring Festival?

— Yes, but I really _____ because I have a lot of things to deal with.

A. can’t   B. mustn’t   C. won’t   D. shouldn’t

 It is said that there are plenty of hotels in that town. There _____ be any difficulty for you to find somewhere to stay.

A. wouldn’t      B. mustn’t      C. shouldn’t      D. needn’t

 When Marx was in London, he _____ read at the library for hours.

A. would   B. might   C. could   D. should

 Keep up good state of mind even if you _____ fail plenty of times.

A. must  B. will  C. can   D. should

 — Are you coming to Jeff’s party?

— I’m not sure. I _____ go to the concert instead.

A. must  B. would  C. should   D. might

 — Mary’s got mad and has been sent to the mental hospital. Did you tell her boss about that?

— Yes, but I _____ her husband first.

A. should have told    B. shouldn’t have told    C. must have told   D. needn’t have told

 My English-Chinese dictionary has disappeared. Who _____ have taken it?

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