单项选择题

______ of them has been to Beijing before.

A．Each
B．Both
C．An
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单项选择题
A strong wind will arrive in Harbin. It will ______ much rain.
A．bring
B．take
C．carry
单项选择题
He ______ the house twelve years ago.
A．bought
B．has bought
C．had bought
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