单项选择题

Researchers at the University of Illinois determined that the （） of a father can help improve a child's grades

A. involvement
B. communication
C. interaction
D. association

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单项选择题
The drunk man was running from side to side in the crowd and he knocked into （）.

A. one person after another
B. one by one
C. a man and woman
D. persons after persons
单项选择题
What's your opinion of our teacher's new painting It would seem to me that it's （） his usual standard.

A. beyond
B. below
C. beside
D. before
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