单项选择题

Our department has a large collection of books,（）are in English.

A．many of which
B．many of them
C．many ones
D．their many

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单项选择题
Tom didn't tell his wife that he had been fired, but he（）.

A．would do
B．had to
C．should have
D．might have to
单项选择题
It is vital that you （） quickly to whatever is said.

A．respond
B．responded
C．will respond
D．are responding
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