单项选择题

Not only ______ study well,but also he is always ready to help others.

A．he does
B．he did
C．does he
D．did he
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单项选择题
Next week they ______ in the factory for ten years.
A．will be
B．will have been
C．are
D．have been
单项选择题
______ do we go for picnics.
A．Certainly
B．Seldom
C．Sometimes
D．Once
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