题目内容：

The sun is always shining. But it can only shine on one side of the earth at one time.When the sun is shining on one side of the earth, it is night on the other side.

    At night, you can see the stars. The stars are in the sky all day. But the light from the sun is so bright that you can't see them. When night comes, there is no light, and the stars are bright enough to see. The stars look very small. But some of them are even bigger than the sun. They look small because they are so far away from you. Big things look much smaller when they are far away. The sun is closer to the earth than other stars, so it looks bigger.

1.When it is night, the sun ________.

A. doesn't shine

B. shines for a short time

C. disappears (消失)

D. shines on the other side of the earth

2.We can't see the stars in the sky at daytime because ________.

A. there are no stars there

B. the stars are much smaller than the sun

C. the bright light from the sun makes them not seen

D. the stars come out only at night

3.The stars look small because ________.

A. they are far away

B. they are small

C. they have no light

D. they are in the sky

4.Small things may look ________ when they are close.

A. bigger    B. small

C. near    D. far away

5.The sun looks bigger than other stars because ________.

A. it's bigger

B. it's far away in the sky

C. It gives much bright light

D. it's closer to the earth than other stars