单项选择题

It is necessary that a student()his lesson before coming to class.

A．will prepare
B．prepares
C．must prepare
D．prepare

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单项选择题

It was John()she sent these postcards.

A．to whom
B．whom
C．who
D．that

单项选择题

()does he write well,()he also speaks well.

A．Not only, but
B．Neither, nor
C．Either, or
D．Both, and

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