Yang Liwei is the first man ________ themoon.

But for your timely warning, we ____ into great trouble.— You know we’re friends. [ ]

reading room, we found her ________ at a desk,with her attention ________ on a book

People often think they are energetic and healthy and don’t need exercise _______ , I have to warn that it is completely wrong

My sister ______ goes to bed early because she needs a lot of sleep every day.