单项选择题

The ______ of such I. Q. tests full of questions on American culture was not questioned at that time.

A．significance
B．validity
C．efficiency
D．justification
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单项选择题
She wanted desperately to turn the flower-painted china ______ on the apple-green door, and go through, but somehow she could not.
A．frame
B．pole
C．pan
D．knob
单项选择题
Why do teens drink Reasons vary from ______ pressure to family patterns to social conditioning.
A．spouse
B．peer
C．antagonist
D．competitor
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