How much do you know about the universe? In the huge universe, there is the Galaxy and many other galaxies. In the Galaxy, there is the Solar System and lots of other stars. In the Solar System, there is the sun, the earth and seven other planets. As we know, the eight planets go around their star -----the sun. In our Earth-moon System, the moon goes around the earth. And because our earth keeps turning around the sun all the time, we have day and night. When our part of the earth turns to the sun, it is day. When our part of the earth turns away from the sun, it is night.

Just because the moon is closer to the earth than the sun, it looks much bigger than the sun. The sun is big enough to give out very strong light. The moon itself can’t give any light at all, but it looks quite bright, too. In fact, the light from the moon comes from the sun. Although , the moon looks much bigger and brighter than the sun and other stars, in fact, all the stars are much bigger and brighter than the moon. They look smaller than the moon also because they are farther away from us. It’s clear that big things will look smaller when they are farther , and small things look bigger when they are nearer.

So far, we have traveled to many other planets in the universe. But scientists haven’t discovered any living things on any other planets. Scientists haven’t discovered any other planets with a good environment. They aren’t sure if there is any water and air for living things to live on other planets. People always ask the question: Is there anyone out space? Our scientists haven’t got a clear answer either. Some people think it will be a secret for a long time. But we believe we can solve* the problem some day.

Exploring our Solar System and the universe is a great national project to some countries. Our Chinese scientists are also trying to send spaceships with astronauts to those planets and even the universe. At 9:00 a.m. on October 15th, 2003, a Chinese astronaut called Yang Liwei was sent up to space. He stayed there for hours and got back to the earth at 6:00 a.m. the next day. It was the first time for Chinese to have a space travel.

1.When our part of the earth turns to , it’s day.

A. the moon B. the stars C. the universe D. the sun

2.Why does the moon look bigger than the stars?

A. Because in fact the moon is bigger than the stars.

B. Because the moon is father from the earth than the stars.

C. Because the stars is nearer our earth than the moon.

D. Because we are closer to the moon than the stars.

3.In Para.4, what does the underlined word it refer* to ?

A. the people’s question B. the scientists’ answe

C. the universe D. the environment

4.According to the passage, we can infer that .

A. not all the planets go around the star in the Solar System

B. the moon looks bright because it can give strong light

C. it is hard work for scientists to discover if there is any living things out space

D. few countries are trying to explore the universe

We’ve talked about snails (蜗牛) and their slow move. But much of the time snails don’t move at all. They’re in their shells ---sleeping .

Hot sun will dry out a snail’s body. So at the least sign of hot sun, a snail draws its body into its shell and closes the opening with a thin cover. Then it goes to sleep. A snail will die in a heavy rain. So whenever it rains, it goes inside its shell house and goes to sleep. A snail can sleep for as long as it needs to. It can take a short sleep. Or it can sleep for days at a time. And it spends all the winter months in its shell, asleep.

In spring the snail wakes up. Its body, about three inches long, comes out of from the shell. When hungry, the snail looks for food. It can’t see very well. Its eyes, at the ends of the top feelers are very weak. But its sense of smell is very strong. It helps the snail to the new greens. Then the snail’s little mouth goes to work.

A snail’s mouth is no longer than the point of a pin(针). Yet it has 256,000 teeth! The teeth are so small that you can’t see them. But they do their work.. If you put a snail in a hard paper box, it will eat its way out. And if a snail wears out its teeth, it will grow new ones.

Mostly, a snail looks for food at night .But on cloudy days it eats in the daytime. It eats all day long. A snail can go on eating for hours and never feel full.

1.A snail__________.

A. moves more slowly in the daytime B. has thousands of feet

C. doesn’t move at all D. sleeps much of the time

2.In the sentence “A snail draws its body into its shell” the word “draw” means_________.

A. to make with a pen B. to keep away from

C. to pull D. to move to end

3.From the story we know_________.

A. the snail’s shell is very thin

B. a snail can’t see well

C. the snail’s nose is quite short

D. the snail’s body changes in different seasons

4.A snail goes to sleep when_________.

A. it feels hungry B. it is put in a paper box

C. spring is coming D. it rains heavily

5.Which of the following in not true?

A. A snail doesn’t like living under the sun.

B. In winter the snail doesn’t eat or move.

C. The snail’s teeth can’t be worn out..

D. The snail’s strong sense of smell helps to find things far away.

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