单项选择题

As we all know, telephone wires are______ by a covering of rubber of paper.

A．wedged
B．strapped
C．insulated
D．stiffened
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单项选择题
The club members held a secret______ to choose the chairperson in the evening.
A．ballet
B．ballot
C．bankrupt
D．banquet
单项选择题
As a firm rule, a soldier who______ his post in time of war is to be shot.
A．deserts
B．deflects
C．detains
D．defies
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