He has to do his homework first.改为一般疑问句.The weather is nice today,——?反意疑问句.
Mary visits her parents once a month.对once a month提问.
人气：110 ℃ 时间：2020-04-03 12:33:36
解答
Does he have to do his homework first?
The weather is nice today,isn't it?
How often does Mary visit her parents?
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