单项选择题

It is only in the last decade that people have become aware of the threat to the quality of the environment by unrestricted industrial production.

A．posed
B．propelled
C．prompted
D．provoked
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单项选择题
At Christmas, most families will set up their Christmas trees in a _________ place of their home and decorate them with fancy ornaments.
A．prominent
B．dominant
C．outstanding
D．fantastic
单项选择题
John is planning another travel abroad, yet his passport will at the end of this month.
A．terminate
B．cease
C．exceed
D．expire
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