单项选择题

（）I saw the machine, I could not have imagined how efficiently it works.

A．But for
B．Because
C．But that
D．If

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单项选择题
In some countries more and more young people now wear （）hair.

A．false
B．untrue
C．spare
D．unnatural
单项选择题
The Weather Bureau has repeatedly advised the people to take every （）against the coming typhoon.

A．protection
B．precaution
C．prevention
D．prediction
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