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

问题描述:

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

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.