单项选择题

In many buildings hot water ______ through pipes to keep rooms warm.

A．penetrates
B．circulates
C．chokes
D．surrounds
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单项选择题
Since there was no capital punishment in that country, the murderer was ______ to life imprisonment.
A. judged
B. confessed
C, verified
D. condemned
单项选择题
When you drive, you should ______ to traffic regulations.
A．consent
B．conform
C．refer
D．resort
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