单项选择题

As a result of the crisis, the government is urging people to be （）with energy.

A. economical
B. economy
C. economic
D. economics

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单项选择题
6（）

A.first
B.later
C.repeatedly
D.often
单项选择题
Watching me pulling the calf awkwardly to the barn, the milkmaid fought hard to （）her laughter.

A. hold out
B. hold back
C. hold up
D. hold off
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