单项选择题

A teacher（）do every exercise but a student（）

A. may not ; must
B. needn't; must
C. can't; should
D. mustn't; should

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单项选择题
Eat as many vegetables as possible, for they are rich （） iron.

A. of
B. in
C. with
D. for
单项选择题
We couldn't eat in a restaurant because （）of us had（）money on us.

A. all ; no
B. any ; no
C. none ; any
D. no one ; any
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