单项选择题

A．In his free time.
B．At weekends.
C．Once a week.
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单项选择题
If Mr. Smith wants to know who is answering the call, he says, ______
A．Who is talking
B．Who are you
C．Who is that
单项选择题
David thinks he spends too much time on his work.
[A] True
[B] False
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