Question

(阅读理解) What is the sky? Where is it? How high is it? What lies above it? These questions are difficult to answer, aren't they? Is the sky blue? The sky has no color. We know that they're around the world. When planes fly, they need air to lift their wings. Planes can't fly very high because when they go higher, the air gets thinner. If we go up about 1,200 kilometers from the earth, we find there is no air. Perhaps we can answer some of our questions now. The sky is space. In this space there is only the sun, the moon and all the stars. (1) What is the sky　? A.It's moon.　　　　 B.It's the sun. C.It's space.　　　　 D.It's nothing. [　　] (2) The sky ______　. A.is blue　　　　　　 B.is white and blue C.has no color　　　　 D.is air [　　] (3) Planes can't fly very high because ______　. A.the air becomes thinner　　　　 B.some people are afraid C.there is more air　　　　 D.people are afraid [　　] (4) We find ______ air if we go up about 1,200 kilometers from the earth. A.there is a little　　　　 B.there is no C.there is much　　　　 D.there is nothing but [　　] (5) In space there is ______　. A.nothing　　　　 B.more air everywhere C.everything　　　　 D.only the sun, the moon and all the stars [　　]

Answer 1

答案：1．C ;2．C ;3．A ;4．B ;5．D ;