单项选择题

A．Professor and student.
B．Doctor and patient.
C．Waiter and customer.
D．Clerk and customer.
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单项选择题
A．At 9:00.B．At 9:30.C．At 9:25.D．At 10:00.
A．At 9:00.
B．At 9:30.
C．At 9:25.
D．At 10:00.
单项选择题
A．Winding the watch.B．Stopping the watch.C．Setting the watch by the radio.D．Asking Mary about the time.
A．Winding the watch.
B．Stopping the watch.
C．Setting the watch by the radio.
D．Asking Mary about the time.
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