单项选择题

The discoveries of science often are a mixed blessing. On the one hand they give us valuable pesticides that enable the farmer to grow more abundant crops and on the other hand they the benefits by destroying the balance of nature.

A．compromise
B．misplace
C．damage
D．counterract
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单项选择题
The Supreme Court ______ the judgement of the lower court in that case last week.
A．amplified
B．affirmed
C．ascended
D．applauded
单项选择题
To compensate for the substantial decline in the availability of fossil fuels in future years, we will have to provide at least an ______ alternative energy source.
A．anticipated
B．official
C．equivalent
D．emotional
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