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
He’s watching TV He’s（）to be cleaning his room.

A. know
B. supposed
C. regarded
D. considered
单项选择题
Quite a lot of people watch TV only to（）time.

A. waste
B. spend
C. kill
D. pass
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