Unit 7 What's the highest mountain in the world?单元检测题
Ⅰ.单项选择(10分)
1. I'll let you borrow my storybook on one ______ — you lend your bicycle to me.
A. relation B. opinion C. decision D. condition
2.—Is this tree 500 years old?
— Yes, it's really a(n) ______tree.
A. normal B. lonely C. ancient D. broken
3.—You finally passed the driving test,right?
— Yes. Thanks to you,I______ .
A. succeeded B. understood C. changed D. returned
4. Stephen Hawking has______ great success as a scientist.
A. allowed B. achieved C. practiced D. promised
5. She wanted to try her best to solve the problem,  ______many people think it is impossible to make it.
A. as if B. even though C. so that D. ever since
6. If you have any question, please______ to ask me.
A. lie down B. wake up C. feel free D. fall asleep
7.—Do you know which country has the largest ______in the world?
—Of course it is China.
A. land B. water C. population D. gold
8.—I______ nearly 75 kg now. Is it because I eat too much junk food?
—I am afraid it is. If you want to keep fit, you'd better lose weight(减肥).
A. take B. weigh C. force D. protect
9.— What's ______mountain in the world?
—Qomolangma. It is 8848.86 meters high according to the latest report.
A. higher B. highest C. the highest D. high
10.—The Great Wall runs about 21,200 kilometers. — Wow!______ .
A. It's OK B. Good idea C. That's amazing D. You are welcome
Ⅱ.完形填空(20分)
Have you ever heard of Mount K2(乔戈里峰)?It is known as Savage Mountain because many people used to die or get hurt while 11______ it.
K2 is the second highest mountain in the world after Mount Qomolangma. People never cli
mb Mount K2 in 12______. Both storms and cold weather make it 13______ to climb this mountain during that time. K2is famous as one of the most 14______ mountains to climb. It is known by different 15______ such as Chogori,Ketu and Mount Godwin-Austen. The name Chogori 16______“the king of mountains”. This mountain lies between the border(边界)of Pakistan and China.
A part of the mountain lies in Pakistan. The other 17______ of the mountain lies in Xinjiang, China. Thomas Montgomerie did the first survey of Mount K2 and measured(测量)its height. He named the 18 ______K2,where“K”stood for Kechu. K2 was the second mountain listed,so the name 19______ the number“2”. The best time to climb K2is between April and October. It 20______ at least 3 weeks to complete the climbing.
11. A. climbing B. walking C. swimming D. moving
12. A. spring _ B. summer C. autumn D. winter
13. A. important B. impossible C. silent D. amazing
14. A. difficult B. easy C. interesting D. sleepy
15. A. names B. places C. mountains D. trees
16. A. listens B. shows C. calls D. means
sort out the facts17. A. side B. part C. joy D. nature
18. A. mountain B. people C. river D. protection
19. A. completed B. included C. provided D. depended
20. A. spends B. joins C. takes D. goes
Ⅲ.阅读理解(18分)
A
All aboard!Let's take a ride on the world's highest railway—the Qinghai-Tibet Railway(青藏铁路). Sit back and enjoy the journey. Get ready for the trip of a lifetime.
We're leaving Qinghai Station. The scenery along the way is some of the wildest in all of China. Keep your eyes open as we race through this beautiful land. You might see a rare Tibetan antelope(藏羚羊)from your window.
Before we begin our journey,let's learn about this amazing railway. It's truly one of the greatest engineering wonders of the 21st century. When it was opened to traffic on July 1,2006,the Tibet Railway set nine world records,including the world's highest railway at 5,072 metres above sea level,the world's highest tunnel(隧道)at 4,905 metres,and the longest tunnel ever built on permafrost(永久冻土层).
As we travel higher,the air gets thinner and thinner. Soon there will only be 50 to 60 percent of the oxygen which is used to breath. But don't be afraid. Each rail car has two separate oxygen systems. One system spreads oxygen throughout the train at all times. And each passenger can also get a personal oxygen mask just like those used in planes.
Here are a few more things to think about as our train leaves the station. The designers solved three main challenges when building this great railway. First,the high altitude(海拔)made the task difficult because there was no enough oxygen. Second,much of the railway runs across permafrost, a type of ground that keeps changing as the weather warms and cools. Finally,the railway goes through some of the most sensitive ecology(敏感的生态环境)in China. Great care was necessary to make sure of the smallest possible influence on nature.

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