单项选择题

That is the key()solving the problem.

A．at
B．to
C．for
D．in

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单项选择题
He said he would tell me()our geography teacher told him last week.

A．all what
B．which
C．all
D．all which
单项选择题
Over sixty percent of the church()destroyed during a bomb (炸弹) attack in the second World War.

A．have been
B．has been
C．was
D．were
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