Every day when I enter the classroom, I will take a look at the wall beside my seat. You will find nothing special about this old wall if you just look at it. But for the students in my class, it is a special wall. Take a good look at it, and you will get to know the real feelings and thoughts of us, the 9th graders.
In the middle of the wall, there is a big "VICTORY". It was written in pencil. I guess it must have been written by someone who got a good mark in an exam.
A little higher above the formulas, there is a poem. It only has two sentences. It reads: All those sweet memories have disappeared. Like tears dropping in the heavy rain.　　         Oh! It must have been written at the end of the last semester in middle school. Classmates had to leave school and good friends had to part. What a sad poem!
If you "explore" the wall more carefully, you will find many other interesting things, like a crying face, or a happy face, and other patterns(图案). There are still some patterns and letters that I can't understand, but they all show the feeling of the students who drew them.
For years, the wall has witnessed(目睹) all the things that have happened in the classroom. I don't know how it will be next year, two years from now, or even ten years from now. But I hope more smiling faces will be drawn on it.
【小题1】There is ____ special on this wall.

I ______, but I was prevent by the heavy rain.

　 A. had meant coming 　 B. had meant to come

　 C. meant to come 　   D. meant coming

I ______, but I was prevent by the heavy rain.

　 A. had meant coming 　 B. had meant to come

　 C. meant to come 　   D. meant coming

Force other than damaging winds are also at work inside tornadoes. Sometimes, as the turning, jumping funnel(漏斗) passes over a house, the walls and ceiling burst apart as if a bomb had gone off inside. This explosion(爆炸) is caused by the low air pressure at the center of a tornado.

The pressure at the center of a tornado is usually 13 pounds per square inch. However, inside the house the air pressure is normal, about 15 pounds per square inch. The difference of 2 pounds per square inch between the inside and outside pressure may not seem like much. But suppose a tornado funnel passes over a small building that measures 20 by 10 by 10 feet. On each square inch of the building, there is 2 pounds of pressure from the inside that is not balanced by air pressure outside the building. On the ceiling, that adds up to an unbalanced pressure of 57,600 pounds. The pressure on the four walls adds up to 172,800 pounds.

If windows are open in the building, some of the inside air will rush out through them. This will balance the pressure inside and outside the building. But if the windows are shut tightly, the great inside pressure may cause the building to burst.

　　Unfortunately, heavy rain happens in thunderstorms that later produce tornadoes. So, people often shut all windows to protect their property. This may cause far worse damage later.

63. Which of the following is the main topic of the passage?

A. Where tornadoes are formed. 　　      B. When tornadoes usually occur.

C. How tornadoes can be prevented.　　     D. Why tornadoes cause so much damage.

64. According to the passage, tornadoes can destroy building because the _____.

A. force of a tornado increases the air pressure in a building

B. air pressure at the center of a tornado is over 172,000 pounds

C. weight of a tornado can crush a building’s roof when it passes overhead

D. air pressure inside a tornado is less than the air pressure inside a building

65. According to the passage, the pressure on a building during a tornado can be reduced　　　　by _____.

A. closing the windows 　　　　　        B. opening the windows

C. using an electric fan 　　　　          D. making the roof and walls stronger

1. 别老是依赖父母，你应该独立！

Don’t always _________   _________your parents. You should stand on your own feet!　

2.好朋友应该互相分享快乐和忧愁。

Good friends should __________ happiness and sorrow _________ each other .

3. 即使你是成年人，你有时候也会犯错。

___________   ___________you are adults, you can make mistakes.

4. 如果你有疑问，你可以求助于你的老师。

If you have questions, you can __________   __________your teachers for help.

5.因为大雨，我们的旅游计划被取消了。

    __________   __________ the heavy rain, our travel plan was put off.