【題目】A number of animals killed and the number of them getting smaller and smaller.

A. has been; are B. has been; is C. have been; is D. have been; are

【答案】C

【解析】

句意：許多的動物被殺死，它們的數(shù)量變得越來越小。根據(jù)a number of“許多……；大量……”，作主語時謂語動詞用復數(shù)；the number of“……的數(shù)量”，作主語時謂語動詞用單數(shù)。故選C

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