Question

 When man began to search the sky,he saw a lot of things. In the universe,the earth seemed to be just a small bit of dust. It is only a small planet and travels around the sun. The sun together with its planets travels in the Milky Way (银河）一our galaxy (星系）.The Milky Way has about thirty billion stars like our sun,and it is one of about a hundred million galaxies in the universe.

Because the space is so great,it is difficult to work out how far a star is. Instead of kilometers,we have light years. A light year means how far light travels in one year. Light can travel at 300，000 kilometres each second. Our nearest neighboring galaxy is more than 9,000,000 light years away from the earth.

根据材料内容选择最佳答案。

(   ) 1. Man has known that        .

A. the Milky Way is the only galaxy

B. other galaxies are near ours

C. the sun is a large star in the Milky Way

D. the earth is a small part of the universe 

(   ) 2. What’s a galaxy?

A. A large group of stars.

B. The sun.

C. Planets like the earth.

D. The universe.

(   ) 3. What can we see in the Milky?

A. Galaxies.

B. Suns like ours.

C. Stars like our sun.

D. Both B and C.

(   ) 4. What do we use to work out how far a star is  from us?

A. Kilometers. B. Meters.

C. Light years. D. Months and years.

(   ) 5. Our nearest neighboring galaxy is as far away as light

 can travel in        .

A. a year

B. 9，000，000 years

C. 3 seconds

D. 90 million light years

Answer 1

1. D 从文中的第一段 In universe,the earth seemed to be just a small bit of dust. It is only a small planet and travels around the sun.可知

2. A从文中的第一段 The Milky Way has about thirty billion stars like our sun,and it is one of about a hundred million galaxies in the universe.可知。

3. C  从文中第一段 The Milky Way has about

thirty billion stars like our sun...可知。

4. C从文中的第二段前两句大意可知是用光年来 计算的。

5. B 从文中的第二段 Our nearest neighboring galaxy is more than 9,000,000 light years away from the earth.可知。