.It takes Mars about two years to revolve around the sun.(对画线部分提问)To prevent us from floating in the air,we must wear special boots.(对画线部分提问)

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.It takes Mars about two years to revolve around the sun.(对画线部分提问)
To prevent us from floating in the air,we must wear special boots.(对画线部分提问)

保证答案准确率!
1.对about two years划线提问,答案为:
How long does it take Mars to revolve around the sun?
2.对To prevent us from floating in the air划线提问,答案为:
Why must you wear special boots?
如果是对special boots划线提问,则答案为:
To prevent you from floating in the air,what must you wear?
或:What must you wear to prevent you from floating in the air?
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