跟踪导练（四）

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A

Not everyone thinks laughter is the best medicine， but it seems to help. Scientists conducted a study on diabetes（糖尿病）patients to test this idea.

Researchers divided 20 high-risk diabetes patients into two groups. Both groups were given standard diabetes medicine. The laughter group （Group L） viewed 30 minutes of humor of their choosing， while the control group （Group C） did not. This went on for a year.

By two months into the study， the patients in the laughter group had a lower level of the hormone epinephrine（荷尔蒙肾上腺素）which is considered to be a measure of stress. After 12 months， HDL cholesterol had risen by 26 percent in Group L but only by 3 percent in Group C. In another measure， C-reactive proteins， a marker of heart disease， dropped by 66 percent in Group L but only by 26 percent in Group C.

“The doctors believe that there is a physical change brought about by positive emotions，” said study leader Lee Berk of Loma Linda University. Other research has also found that humor makes us more hopeful. “Still， more study is needed to determine what these results mean，” Berk said. The research by Berk found that humor can bring about changes in body chemistry. The research result will be presented this month at a meeting in the US. Researches at the University of Maryland School of Medicine showed that laughter causes the inner lining of blood vessels（血管）to expand， increasing blood flow in a way thought to be healthy.

“Lifestyle choices have an important effect on health and these are choices which we and patients should pay attention to，” Berk said in a statement.

1. Scientists conducted the research on diabetes patients to ___ .

A. find out the causes of diabetes

B. bring laughter to diabetes patients

C. find out if laughter is good for health

D. discover the best medicine to cure diabetes

2. The underlined part “HDL cholesterol” in Paragraph 3 is probably ___ .

A. a sign of a serious disease

B. a kind of effective medicine

C. something that can cause stress

D. something good for peoples health

3. According to the passage， after a year of the study， ___ .

A. all members of Group L recovered completely

B. C-reactive proteins dropped 66 percent in Group L

C. C-reactive proteins increased 26 percent in Group C

D. Group Ls level of the hormone epinephrine didnt change

4. In which way does laughter help improve peoples health？

A. It makes blood flow.

B. It makes blood vessels thin.

C. It helps to increase blood flow.

D. It helps to reduce blood pressure.

B

Man is a land animal， but he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea has provided man with food and a convenient way to travel to many parts of the world. Today， nearly two-thirds of the worlds population live within 80 kilometers of the sea coast.

In the modern technological world， the sea offers many resources to help mankind survive. Resources on land are beginning to be used up. The sea， however， still can be expected to supply many of mans needs.

The list of riches of the sea yet to be developed by mans technology is impressive. Oil and gas explorations have been carried out for nearly 30 years. Valuable amounts of minerals （矿物）exist on the ocean floor ready to be mined（开采）.

Fish farming promises to be a good way to produce large quantities of food. The culture of fish and shellfish is an ancient skill practised in the past mainly by Oriental people， like Chinese and Japanese.

Besides oil and gas， the sea may offer new sources of energy. Experts believe that the warm temperature of the ocean can be used in a way similar to the steam in a steamship. Ocean currents and waves offer possible use as a source of energy.

Technology is enabling man to explore ever more deeply under the sea. The development of strong， new materials has made this possible.

The technology to harvest the sea continues to improve. Experts believe that in the near future the problems that keep us from exploiting fully the food， minerals， and energy sources of the sea will be largely solved.

5. The major things that the sea offers man are ___ .

A. fish and oil

B. minerals and oil

C. warm temperature and ocean currents

D. the food， energy sources， and minerals

6. The underlined words “Oriental people” in Paragraph 4 probably refer to ___ .

A. Asian people B. African people

C. European people D. American people

7. We can conclude from this passage that ___ .

A. the sea resources have largely been used up

B. the sea， in the broad sense， has not yet been developed

C. the technology will be good enough to exploit all the sea resources in the near future

D. the problems that prevent us from using the source of the sea have already been solved

8. The best title for this passage is ___ .

A. Sea Food

B. Sea Harvest

C. Man and the Sea

D. Technology for Exploiting the Sea

从下列方框里10个单词中选择8个适当单词的正确形式填入下列各句中，使其句意完整。每个单词只使用一次。

abolish celebrate free import landowner

mark origin trade transport unite

1. Todays ceremony ____ 100 years of trade between us two countries.

2. Foreign ____ keeps the countrys economy healthy.

3. A bus ____ us from the airport to the city center， giving us a chance to enjoy the scenery along the way.

4. There are many bad customs and laws that ought to be ____ .

5. The foreign friends hope that they can join in the ____ of the universitys eightieth anniversary.

6. African people are fighting for the ____ and independence of their countries.

7. England and Scotland ____ in 1706.

8. In view of the present situation， well have to revise our ____ plan.

下列各句每句有1个错误。

1. Im working as a new book， so I dont have a lot of time to do other things. ____

2. Even a pupil knows that a week consists in seven days. ____

3. In the early 1990 the company began to restart the third time. ____

4. As the passing of time， we will grow older and older. ____

1. 汤姆决定联合其他工人反抗不平等待遇，做他们自己的主人。

2. 今天她穿了一条奇怪的裤子，朋友们拿她开玩笑。

3. 不像以前，如今女性已经能自主决定是否要结婚。

4. 为了更好地完成双方这次贸易，我们有必要即时讨论和解决所发生的问题。

1. No matter who you are， its forbidden to make any ___ on the wall of the classroom.

A. signal B. sign

C. sight D. mark

2. Although I was hungry， I still had to wait until the discussion between my mother and father ___ .

A. came to an end B. made an end

C. brought to an end D. put an end

3. If your sister knows that you failed in trying this， she will be___ a little sad.

A. other than B. less than

C. more than D. rather than

4. — I want to buy a cup of coffee. Would you like one？

— Of course， thank you！ ___ .

A. I hate it B. Id love to

C. Its OK D. I dont know

5. When you get the paper back， pay special attention to what ___ by me.

A. have marked B. has been marked

C. had marked D. had been marked

6. He ___ the facts up to make them more interesting and attractive.

A. kept B. took

C. ended D. dressed

7. You have driven for more than ten hours. Would you like someone to ___ the driving， so you can have a rest？

A. take up B. take on

C. take off D. take over

8. When you are found driving after drinking by police， you will be ___ from driving at least for several months.

A. abolished B. stopped

C. banned D. warned

Your seat is moving ever higher. It gives you a birds eye 1 of the whole Beijing when， all of a 2 ， you are thrown 35 meters back down to earth. While the 3 journey only takes two or three seconds， you scream with 4 as the blood rushes to your head...

This 5 experience comes much cheaper than a plane ticket to Disney World. The Mega Drop ride is just one of the

6 at the World Carnival， which will be in Beijing from June 22 to August 26.

7 50，000 square meters， the worlds largest mobile amusement park 8 more than 150 entertainment programs.

The Dutch company World Carnival arrived in Shanghai last June， 9 as much as 100 million yuan from 1.3 million visitors. It is one of several companies 10 to establish themselves in China and use the worlds fastest 11 market to challenge Disney.

But they need to move quickly. Already well-known in China， Disney opened a theme park in Hong Kong in 2005 and began to construct 12 in Shanghai in 2011.

13 ， together with Mega Drop， there are G-Force， Wild Mouse and Top Buzz. With all these sharp turns and steep drops on offer， World Carnival thinks it can 14 .

“I am very 15 that I brought World Carnival to Beijing.” said the company president Hans Lodders， “I think it can 16 as part of the Olympic celebrations.”

17 World Carnival says that “everyone from the ages of 6 to 90 can find his or her favorite games”， you need to be careful.

Take care in the sun： Wear a hat and a long shirt to 18

yourself from the summer sun. Use sunscreen（防晒霜）on the parts of your body that are uncovered.

Dont overreach yourself： Heat and tiredness can make you feel sick. If you have a medical problem， think 19 before you decide to go 20 the most challenging rides.

Crowd control： Be careful not to stumble（绊倒）and fall in the large crowds.

1. A. view B. sign C. scene D. sight

2. A. rush B. sudden C. second D. minute

3. A. breathtaking B. boring

C. comfortable D. ridiculous

4. A. surprise B. disappointment

C. excitement D. interest

5. A. attracted B. thrilling C. dangerous D. risking

6. A. collections B. connections C. attractions D. civilizations

7. A. Having B. Being C. Taking D. Covering

8. A. contains B. collects C. includes D. marks

9. A. having B. producing C. making D. receiving

10. A. looking B. giving C. risking D. leaving

11. A. growing B. reducing C. cutting D. weakening

12. A. other B. the other C. another D. the rest

13. A. Therefore B. Though C. However D. Hence

14. A. thrill B. compete C. beat D. hit

15. A. afraid B. proud C. nervous D. sad

16. A. achieve B. become C. serve D. play

17. A. Once B. Though C. Till D. If

18. A. stop B. keep C. protect D. separate

19. A. hard B. twice C. carelessly D. casually

20. A. on B. through C. over D. round