The pilot kept calm in the terrible storm, otherwise the accident ______.
A. couldn’t be prevented
B. mustn’t have prevented
C. wouldn’t have been prevented
D. shouldn’t prevent
You _____ pay your library fines. If not, you _____ not be allowed to graduate.
A. may; should B. should; need C. must; will D. will; can
Mr. Bush is on time for everything. How _____ it be that he was late for the opening ceremony?
A. can B. should C. may D. must
--What do you think of it?
--I think it is a thing of importance that it ____ done soon.
A. is B. is to be C. be D. to be
She is too slow. She ________ pass the test, but she __________ too little.
A. would; knew B. will; knows C. would; knows D. will; knew
He _______ Shanghai, for I saw him talking with the headmaster a moment ago.
A. must have gone to B. can’t have gone to
C. mustn’t have been to D. can’t have been to
