Question

Our sun is a star, and nine worlds (天体) move round it. Worlds like these are planets. But there are other stars, other suns, not only thousands of them, but millions of them. Do different stars have planets? We can see the planets round our own sun. but we haven’t been anymore. The stars are too far away from us. Stars give out light, but the planets don’t have any light of their own. So we can’t see them. They are too far, and too dark. Still, we can tell that some stars have planets. While a big planet goes round, it pulls its star to one side. And sometimes we can see this. Then we know that the star has a planet. For example, Barnard’s Star is a small red star. And it is the quickest star in the universe. But sometimes it moves slower, and then quicker again. We have known Bernard’s Star for many years, and now we are sure it has a planet.

1.A star is a large body in the universe. It _________.

A. moves round our sun       B. has light of its own

C. can also be called a sun   D. both B and C

2.Which of the following is not true?

A. The earth is one of the sun’s world’s

B. There are millions of suns in the universe

C. The worlds are very bright

D. some stars have planets

3.We can see the planets round our sun. But we can’t see ________.

A. nine worlds in the universe

B. the planets round other stars

C. the satellites round the earth

D. other stars

4.Barnard’s Star moves more quickly than ________.

A. most stars    B. any other star

C. its planet    D. the planets round the sun

5.How can people know that there is a planet round Barnard’s Star?

A. Sometimes they see that the planet pulls the star to one side and makes it move slower.

B. The planet is shining

C. The planet is next to our earth.

D. The planet is a red one.

Answer

1.B

2.C

3.B

4.B

5.A

【解析】

试题分析：本文叙述了宇宙中的天体行星和恒星。恒星会发光，但是行星自己不会发光。有些恒星有一些行星围绕着，一颗行星围绕恒星时，会把这颗恒星拉到一边。

1. give out light,可知恒星会发光，故选B。

2.but the planets don’t have any light of their own.可知行星自己不发光，故不是所有的天体都很亮，故选C。

3.细节理解题。根据We can see the planets round our own sun. but we haven’t been anymore.我们可以看到围绕着太阳转的行星，但是我们看不到围绕其他恒星转的行星。故选B。

4.推理判断题。根据Barnard’s Star is a small red star. And it is the quickest star in the universe.可知Barnard星在宇宙中时最快的星，因此它比其他任何一颗星都快，故选B。

5.推理判断题。根据While a big planet goes round, it pulls its star to one side. And sometimes we can see this. Then we know that the star has a planet. But sometimes it moves slower, and then quicker again.可知一颗行星围绕恒星时，会把这颗恒星拉到一边，Barnard’s Star有时慢一点，有时快一点，可知有行星在围绕着它，把它拉到一边，它的速度就慢下来，故选A。

考点：科普类短文阅读。