Because of the cold weather, half of the...

Because of the cold weather, half of the children________ill for a week.

A. has been B. have fallen

C. have been D. has fallen

C 【解析】试题分析：句意：由于这次冷空气的原因，一个星期，有一半的孩子已经生病了。分析：对现在造成的影响是孩子们生病了，体现现在完成时的用法，构成have/has done（动词的过去分词）。主语是children，因此助动词为have.故选 C 考点：考查动词时态。

考点分析：

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