If you look at the sky one night and see something moving and shining that you have never seen before, it might be a comet (彗星).

　　A comet sometimes looks like a star. Like a planet, a comet has no light of its own. It shines from the sunlight it reflects (反射). Like the earth, a comet goes round the sun, but on a much longer path (轨道) than the earth travels.

       If a comet isn’t a star, what is it then?

　   Some scientists think that a large part of a comet is water frozen into pieces of ice and mixed with iron and rock dust and perhaps a few big pieces of rock. When sunshine melts (融化) the ice in the comet, great clouds of gas go trailing after it. These clouds, together with the dust, form a long tail.Many people perhaps have seen a comet. However no one knows how many comets there are. There may be millions of comets, but only a few come close enough for us to see.

　　An Englishman named Edmund Halley, who lived from 1656 to 1742, found out a lot about the paths that comets take through the sky. Some comets move out of our sight and never come back. Others keep coming back at regular times. A big comet that keeps coming back was named after Halley because he was the one who worked out when it would come back again. Maybe you have ever seen Halley’s Comets because the last time it came close to the sun and the earth was in the year 1986. Then people all over the world were outside at night to look at it. You will probably be able to see Halley’s Comets when it comes near the earth again.

1.A comet is like ________.

A. sun      B. moon     C. sunlight    D. the earth

2.A large part of a comet is ______.

A. water and rock

B. water frozen into pieces of ice and mixed with iron

C. ice, iron and rock dust

D. only a few big pieces of rock

3.Maybe many people _______.

A. haven’t seen any comets      B. have seen all comets

C. have seen a comet at daytime  D. have seen a comet

4.Some comets keep coming back ________.

A. at any time  B. at noon  C. at regular times  D. at daytime

5.Halley’s Comets came back _____.

A. in 1990    B. in 1980     C. in 1986      D. in 1989

根据短文内容和汉语提示，用所给词的正确形式填空。每空限填一词。（10分）

The study of English in Grade Three is really interesting although it is a    1.      

(艰苦的) task for most of us to learn it well. Yes, not easy. In the last few weeks, we have learned about the  2.  (自然的) wonders of the world, the adventures of Tom Sawyer, Liu Xiang and the great  3.  （发明） of paper and printing. When you stand on the edge of the Grand Canyon, you can feel the ground fall away and down to a river, far    4.   （在下面） you. How great it is! Mr Jackson’s favourite   5.   （场景） of the book by Mark Twain is that people are   6.    （高兴） to see Tom  7.  （活着的）. Liu Xiang’s story tells us to work hard so that we can   8.  （打败）the difficulties by ourselves. We also learned that people are thinking about if paper will be  9.   （替代）by computers. However, looking  10. （浏览）a magazine at hand is easier than turning on a computer. Don’t you think so?

完形填空 阅读短文 ，从每小题所给的A、B、C 、D四个选项中先出可以填入空白处的最佳选项（共15空；每空1分，满分15分）

Tom is four years old now. His father works in a middle school and  1  P. E. there. His mother works in a shop and his grandma looks after him  2 . The boy is clever and always  3   that he knows more than his little friends do.

　　 One morning Tom ' s father  4  earlier. His school was going to hold a sports meeting that day. Of course, he was going to be   5  than any other teacher in his school. About two hours later, Tom's grandma 6  sick. Her head hurt but she couldn't go to see a  7   by  herself. She called her son, but 8  answered. So she asked the little boy to go to tell his father about it

As soon as Tom went out, he 9    his friend Henry. And he asked him to go there with him. The boys wanted to watch the sports meeting; and they  10  went there happily. Then they got to school, there were a lot of people on the  11 and the boy ' s 400 metre relay race(接力赛)　12  . They stopped to watch it. And Tom  13  what his grandma told him to do. They were interested in the race. Henry asked, "Why is the front boy running so fast?"

Tom didn ' t know about it. He  14  for a minute and said, "What a fool( 傻瓜) ! Don't you see the other boys with  15  in their hands are running after him?"

1.                A．studies         B．teaches         C．talks about D．watches

2.                A．at school        B．in the zoo       C．in the shop    D．at home

3.                A．tells           B．wants          C．shows    D．likes

4.                A．left            B．stayed          C．came D．ate

5.                A．faster          B．later           C．more free D．busier

6.                A．wanted         B．felt            C．guessed  D．hoped

7.                A．teacher        B．policeman       C．doctor   D．worker

8.                A．nobody         B．somebody       C．everybody D．anybody

9.                A．met           B．hit             C．heard    D．listened to

10.               A．all             B．some          C．many D．both

11.               A．classroom       B．playground      C．garden    D．park

12.               A．finished        B．ended         C．began     D．happened

13.               A．remembered    B．forgot          C．knew D．said

14.               A．saw           B．played         C．thought   D．jumped

15.               A．sticks          B．balls           C．tickets    D．knives

完形填空 阅读短文 ，从每小题所给的A、B、C 、D四个选项中先出可以填入空白处的最佳选项（共15空；每空1分，满分15分）
Tom is four years old now. His father works in a middle school and  1  P. E. there. His mother works in a shop and his grandma looks after him  2 . The boy is clever and always  3   that he knows more than his little friends do.
　　 One morning Tom ' s father  4  earlier. His school was going to hold a sports meeting that day. Of course, he was going to be   5  than any other teacher in his school. About two hours later, Tom's grandma 6  sick. Her head hurt but she couldn't go to see a  7   by  herself. She called her son, but 8  answered. So she asked the little boy to go to tell his father about it
As soon as Tom went out, he 9    his friend Henry. And he asked him to go there with him. The boys wanted to watch the sports meeting; and they  10  went there happily. Then they got to school, there were a lot of people on the  11 and the boy ' s 400 metre relay race(接力赛)　12  . They stopped to watch it. And Tom  13  what his grandma told him to do. They were interested in the race. Henry asked, "Why is the front boy running so fast?"
Tom didn ' t know about it. He  14  for a minute and said, "What a fool( 傻瓜) ! Don't you see the other boys with  15  in their hands are running after him?"