单项选择题

You should ______ your room now and then to keep it supplied with fresh air.

A. ventilate
B. versatile
C. verify
D. versify
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单项选择题
Where there is an earthquake, energy is in ______ in one area along a crack in the earth crust.
A. repelled
B. released
C. run
D. rushed
单项选择题
I have no choice then but ______ the work.
A. finished
B. to finish
C. finish
D. finishing
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