—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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—Amy , I would like your uncle to help me repair the computer. —Sorry, he _____help you today . He won’t come back until tomorrow.
#74730
A
shouldn’t
B
may not
C
can’t
D
mustn’t
It is important to know about the cultural differences that cause problems.
#62570
A
must
B
dare
C
shall
D
may
(2012·四川)—Goodbye，John.Come back again sometime.—Sure，________.
#62443
A
I did
B
I do
C
I shall
D
I will