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 -- Are these _______ all from No. 2 Middle School? -- Yes. They often _________ their free time to help the old here.
#74662
A
volunteers; volunteers
B
volunteer; volunteers
C
volunteers; volunteer
D
volunteer; volunteer
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That man over there _____ be Mr Wang . He has gone to Yushu. 
#74843
A
may
B
mustn’t
C
should
D
can’t
―Do you know where David is? I couldn’t find him anywhere.―Well. He ______ have gone far — his coat’s still here.
#62768
A
needn’t
B
can’t
C
mustn’t
D
wouldn’t
—Must I take the medicine every day?— No, you______.
#77227
A
must not
B
may not
C
haven’t
D
needn’t
Sometimes we have much homework to do, but not often. Anyway, it ______in time.
#76665
A
can finish
B
should finish
C
can be finished
D
should be finished
— The Queshi greenway has become a popular place for Shantou people on the weekends. — That’s right. And you ________ drive your car on it because it is a path for cycling and walking. 
#74467
A
may
B
must
C
shouldn’t
D
don’t have to