—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job? —______ my students have a try?
#62920
A
May
B
Must
C
Will
D
Shall
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—Are you going to help him?—Why ___ I help him? He' s never done anything for me．
#63530
A
would
B
could
C
might
D
should
“I her a long time ago,” he doubted, “She doesn’t look at all familiar.”
#62915
A
might have met
B
should have met
C
might meet
D
should meet
It’s said that there are plenty of hotels in that town. There _____ be any difficulty for you to find one to stay in.
#62899
A
mustn’t
B
oughtn’t
C
needn’t
D
shouldn’t