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
The headquarters of this textile company is in New York while its 20______. companies are located in different parts of the world.
A．parent
B．subsidiary
C．inferior
D．ultimate
单项选择题
Why do teens drink Reasons vary from______pressure to family patterns to so cial conditioning.
A．spouse
B．peer
C．antagonist
D．competitor
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