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

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

 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

 — 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 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

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

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

 — 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

 As it tuned out to be a small house party, we ____ so formally.

A. needn’t dress up       B. couldn’t have dressed up

C. didn’t need dress up       D. needn’t have dressed up

 She’s already an hour late, What _____to her?

A can have happened       B may happen

C should have happened       D may have happened

 I promised to get there before 5 o’clock, but now the rain is pouring down. They ______ for me impatiently.

A. may wait       B. ought to wait       C. could wait       D. must be waiting

 Better go to see my sick colleague right now, ________I?

A. hadn’t       B. didn’t       C. don’t       D. won’t