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
Once the baby has mastered the idea that space is three-dimensional, it ______ out and begins grasping various kinds of objects.
A. shouts
B. reaches
C. aims
D. pull
单项选择题
Proper clothes ______ for much in business. That’s why you see most business people dress formally.
A. count
B. account
C. allow
D. care
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