单项选择题

Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are （）off.

A. avoided
B. excluded
C. screened
D.separated

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单项选择题
I would never have （）a court of law if I hadn’t been so desperate.

A. sought for
B. accounted for
C. turned up
D. resorted to
单项选择题
Mark Evens, who had failed the physics test, was sitting on a bench in the corner（）over his disappointment

A．complaining
B．meditating
C．brooding
D．apologizing
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