单项选择题

A．He should have made an appointment.
B．He should have called to cancel his appointment.
C．He should have come for his appointment.
D．He should have stayed at home until he was well.
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单项选择题
A．At a hotel.B．At a post office.C．At a Museum.D．At a band.
A．At a hotel.
B．At a post office.
C．At a Museum.
D．At a band.
单项选择题
Before DNA fingerprinting is used, suspects ______.
A．would have to leave their fingerprints for further investigations
B．could easily escape conviction of guilt
C．would have to submit evidence for their innocence
D．could be convicted of guilt as well
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