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The zoo keepers is worried because the number of visitors smaller and smaller. A

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The zoo keepers is worried because the number of visitors smaller and smaller. A

The zoo keepers is worried because the number of visitors  __        smaller

and smaller.

A. become    B. became     C. is becoming   D. have become

试题答案

C

解析:

略

标签：becauseworriednumberthezoo

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