>
英语
>
The children ( ) doing their homework.
A.aren't B.isn't C.don't D.not
人气：241 ℃ 时间：2020-01-30 06:30:05
解答
A.
children是复数,此句为进行时态,“孩子们现在没有在做
作业
.”
所以选be动词,选are not
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