摘要:The park is far away from here indeed it’s about walk A. Three hour B. a three hour’s C.a three-hours D.a three-hour

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Our nearest neighbor is the moon. In the sky,  the moon and the sun seem to be of the same size because the moon is much nearer.
The moon makes the tides—the changes in the level of the sea. The moon and the sun together pull the sea. In some parts of the world,  the difference between * high tide’ (when the sea is very near to the land) and ’ low tide’ (when the sea is far away from the land) is very big. This is very important for ships.
The moon is very different from the Earth. Gravity on the moon is six times weaker than that on the Earth. There isn’t any air. During the day,  it is very,  very hot but at night it is very,  very cold. Nothing can live on the moon.
If the moon goes between the Earth and the sun,  we have an eclipse of the sun(日食) . The moon stops the light from the sun and we have night in the day.
If the Earth goes between the moon and the sun,  we have an eclipse of the moon. The moon goes into the shadow( 影子) of the Earth and it disappears for a few minutes.
【小题1】When the moon goes between the Earth and the sun,  we have night in the day, we call it the eclipse of

A.the moonB.the sunC.the starsD.the Earth
【小题2】 Which of the following happens when we have an eclipse of the moon?
A.The Earth goes between the moon and the sun.
B.The moon goes into the shadow of the sun.
C.The moon goes into the shadow of its own.
D.The sun disappears for a few minutes.
【小题3】Which of the following statements are TRUE?
a. The moon and the sun are of the same size.
b. Gravity on the Earth is 6 times stronger than that on the moon.
c. The changes in the level of the sea are called tides.
d. The moon itself pulls the sea and makes the tides.
e. When the sea is near to the land,  a high tide may happen.
f. It is much hotter in the day but much colder at night on the moon.
A.a. b. c. f.B.b. c. d. eC.a. d. e. fD.b. c. e. f

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Comets(彗星) are parts of our solar system. Like the planets, they go around the sun.
But comets are not made of solid rocks like planets. A comet is a ball of dust, stones, and ice. Many people call comets dirty snowballs.
The “snowball” may be only a few miles across. But when the sun heats the “snowball,” much of it is changed to gases. The gases spread out and form the comet’s head, which may be thousands of miles across.
A comet moves fast in its trip around the sun. But when we see it, the comet does not seem to move. That’s because it is so far away. The moon moves fast, but when you look at it, you can’t see any motion(运动). That’s because the moon is far away.
Each year astronomers(天文学家) discover new comets. Some of them are seen only once. They make one trip around the sun and then go away out into space. The sun’s gravity cannot hold them.
Other comets, like Halley, keep returning. They have been captured by the sun. Halley’s earliest visit was probably 3,000 years ago. It may keep returning for another 3,000 years.
But every time a comet goes around the sun, the comet loses part of itself. Gases and dust are pulled out of the comet. That’s why Halley is now dimmer(暗淡的) than it used to be. Next time it visits us, in 2062, it may be even dimmer. Each visit it may get dimmer and dimmer, until it finally disappears.
【小题1】What is this passage mostly about?

A.Comets and the sun.
B.Why comets are like snowballs.
C.Who discovered the first comet.
D.Facts about comets.
【小题2】How does the writer help the reader understand what a comet looks like?
A.By telling about a famous one.
B.By explaining how far away it is.
C.By describing how fast it moves.
D.By describing it as a dirty snowball.
【小题3】What is the most likely reason the writer wrote this passage?
A.To give information about comets.
B.To tell readers about famous comets.
C.To explain the importance of comets.
D.To encourage readers to look for comets.

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