—The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?—____ my students have a try?
#86806
A
Shall
B
Must
C
Will
D
May
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Cars play an important role in modem life, but they also cause many problems like air pollution.
#87845
A
should
B
can
C
must
D
will
He is not native; if he were, we ______ this discussion over his identity.
#87100
A
would not be having
B
are not having
C
had not had
D
will not have
If they what I was saying, they'd know what I was talking about
#86853
A
took the trouble to listen to
B
had trouble listening to
C
take the trouble to listen to
D
have trouble listening to
We ___have hurried all the way to the airport—the flight was called off because of the foggy weather.
#87566
A
mustn’t
B
couldn’t
C
needn’t
D
wouldn’t