You look tired, so you           stop to have a rest．

A．mustn’t                             B．should                        C．would

　阅读短文，用方框内所给单词的正确形式填空，使短文意思通顺、完整。注意:①每个词只能用一次。②每空限填一词，有些词需要做相应的变化。③其中有两个多余选项。

　　Mary is my best friend. She is a lovely girl with two big, beautiful eyes. But she always hides them behind a pair of black 66 .

　　One day, however, I nearly ended our friendship. I remember that day 67 . We were sitting in the classroom. The teacher was giving us our results of an English exam. I had done badly. I felt 68 sad that I wouldn't talk to anyone. At lunchtime, I even stayed in the classroom alone. Suddenly, I heard a voice. It was Mary. “You look 69 ,"she said,   "What’s wrong?” I looked at her for a while, but said nothing. I knew Mary had got a good mark in the exam. I thought she was 70 at me. I sat silently, but Mary didn’t go away. She kept asking me questions, “Is it because of the exam? Do you want me to help you with your mistakes in your exam paper?” I looked away 71 her. When I looked up again, Mary had gone. And so bad my exam paper! I didn’t know what to do. I looked for my paper everywhere, but 72 find it.

　　In the afternoon, Mary came up to my desk and gave me my exam paper back. I looked at it and got a big 73 . Mary had written the reasons why I had made the mistakes next to each of my mistakes! How kind she was! My face turned red. I wanted to hug(拥抱）her, but I only held her hands and said, “Thank you.” That afternoon, 74 Mary and I were on the way home, I felt quite happy and thanked 75 again. We are still best friends.

In the sea there are many islands. In its warm waters there are some little ones. We call them “Coral(珊瑚) Islands”. A coral island is very nice to look at. It looks like a ring of land(一圈陆地) with trees，grass，and flowers on it. One part of the ring is open to the water. There is a little round lake inside the island. If you look into this lake，you will see beautiful coral. You may think they are flowers. If you look at a piece of coral，you will see many little holes in it. In each of these holes a very small sea animal has lived. These small animals make the coral. They began to build(营造)it under the water. Year after year, the coral grew higher and higher. At last it grew out of the water. Then the sea brought small trees and something else to it. After some years，these things changed into earth. Sometimes the wind brought seeds to the island. Sometimes birds flow over it and brought seeds to the island. The little seeds grew. In a few years there were plants all over the island. In a few more years there were trees growing there. So you see，these islands were built little by little (一点点形成的).The workers were very small. Don't they teach us a lesson? Can you think what the lesson is?

26. There are____ in the holes in corals.

　 A. flowers 　　　 B.1ittle corals 　　C. grass 　　 D. sea animals

27. How did seeds of trees，grass and flowers come to the coral islands?

　 A. The wind and birds brought them to the coral islands

　 B. Only the wind brought them there

　 C. People brought them there　　　　　

　　　D. Fishes brought them there

28. From the story we learn that__________.

　　　A. small workers can't do big things　　

　　 B. only big workers can do big things

　 C. small workers can do big things if they work hard and work a long time.

　 D. all small things call do big things

When you look up into the sky at night, have you ever felt that your eyes are playing tricks on (捉弄) you? It seems that the stars are moving all the time.
Actually, there is nothing wrong with your eyes. This twinkling effect is called scintillation (交光). Scintillation happens because of air movements in the earth’s atmosphere (大气). Light is “bent (弯曲的)” when it travels through different parts of the earth’s atmosphere. As the air in the earth’s atmosphere is moving all the time, the light from the stars looks as if it is moving too.
The same thing also happens to things on the ground. On a very hot and shiny day, if you look at the road, the image in the distance is not clear and things move slightly. You can also see the same effect if you drop a rock into water. The rock appears a little unclear under the moving water.
This twinkling effect causes a lot of problems for astronomers (天文学家) since they cannot observe the stars clearly. A telescope (望远镜) was sent into space so that the air movements in the atmosphere could be avoided (避免). It took a long time to build the space telescope but finally in 1990, a huge space telescope called the Hubble Space Telescope was successfully sent into space. Since then, astronomers have many important observations that have helped people understand space better.
根据短文内容，选择最佳选项。 （10分）
【小题1】What happens to the light from the stars we see when the air in the earth’s atmosphere is moving?