问题描述：
children是可数名词,又是复数形式,那为什么还选B呢?一定要讲详细点
Two-thirds of the children in this kindergarten ( )from worker's families. Acomes Bcome Chas come Dhave come
Two-thirds of the children in this kindergarten ( )from worker's families. Acomes Bcome Chas come Dhave come
问题解答：
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