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yangliwei spent about twenty-one hours in space.改成否定句疑问句回答

题目详情
yangliwei spent about twenty-one hours in space.改成否定句疑问句回答
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答案和解析
否定:
Yangliwei ddn't spend about twenty-one hours in space.
疑问:
Did yangliwei spend about twenty-one hours in space?
Yes, he did.
或No,he didn't.