题目内容
【题目】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：许多的动物被杀死，它们的数量变得越来越小。根据a number of“许多……；大量……”，作主语时谓语动词用复数；the number of“……的数量”，作主语时谓语动词用单数。故选C
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