单项选择题

A．Play tennis.
B．See a play.
C．Give a speech.
D．Go swimmin
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单项选择题
A．Receptionist and client.B．Teacher and student.C．Employer and employee.D．Doctor and patient.
A．Receptionist and client.
B．Teacher and student.
C．Employer and employee.
D．Doctor and patient.
填空题
Since its (invent) ______, the telephone has become one of the most important telecommunication instruments in the world.
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