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A．7 hours.
B．14 hours.
C．10 hours.
D．8 hours.
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单项选择题A．It sounds too good to be true.B．It’s up to you.C．Forget it.D．Well, I’m not sure.

A．It sounds too good to be true.
B．It’s up to you.
C．Forget it.
D．Well, I’m not sure.

单项选择题A．Doctor and husband.B．Shop-assistant and customer.C．Host and guest.D．Teacher and student.

A．Doctor and husband.
B．Shop-assistant and customer.
C．Host and guest.
D．Teacher and student.