单项选择题

It was the first time that such a ______ had to be taken at a British nuclear power station.

A．presentation
B．precaution
C．preparation
D．prediction
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单项选择题
This is not an economical way to get more water; ______, it is very expensive.
A．on the other hand
B．on the contrary
C．in short
D．or else
单项选择题
Mr. Smith says: The media are very good at sensing a mood and then ______ it.
A．overtaking
B．enlarging
C．widening
D．exaggerating
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