单项选择题

The doctor maneuvered the instrument skillfully to examine the patient.

A．manipulated
B．manufactured
C．performed
D．moved
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单项选择题
A．shortageB．necessityC．decreaseD．increase
A．shortage
B．necessity
C．decrease
D．increase
单项选择题
He used to play badminton with you, ______
A．didn"t he
B．used he
C．did he
D．gone off
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