单项选择题

Tom puts up his hand（）the teacher asks a question.

A．in time
B．every time
C．some time
D．at times

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单项选择题

（）you have to do is more practice.

A．All that
B．All what
C．That
D．which

单项选择题

If you had asked him for help, he（）you some.

A．might give
B．might have given
C．had given
D．gave

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