.It takes Mars about two years to revolve around the sun.（对画线部分提问）
问题描述：
.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）
答
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...