单项选择题

The engine is ______ at 6,000 revolutions per minute.

A．turning in
B．turning off
C．turning over
D．turning to
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单项选择题
From the way you are talking I can only ______ the conclusion that you are not the slightest bit interested in the project.
A．draw
B．arrive
C．come
D．take
单项选择题
The most important environmental influence on fish is water temperature, for fish tend to ______ the temperature of their surroundings.
A．avoid
B．exceed
C．assume
D．regulate
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