填空题

A．nation
B．pollution
C．motion
D．question

【参考答案】

D

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______ the PLA men the villagers would not have survived the flood.

A．It had not been for
B．Had it not been for
C．Were it not for
D．Has it not been for

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If law and order ______ not preserved, people will not he able to live a secure life.

A．are
B．were
C．is
D．was

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