题目内容

【B3】

A. a number of
B. the number of
C. the amount of
D. an amount of

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A. cheer
B. chest
C. chemist
D. cheat

A. where
B. in which
C. that
D. what

A vacation trip to Yellowstone Park.
B. A lecture by a visiting professor.
C. Her biology thesis.
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A. It's useless.
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