Is it true _____ the rain stops, it will be as hot as in the summer here?

　　A. when   B. that when   C. whenever  D. that

Some animals apparently can resist cancer by strengthening their immune nervous system in preparation for winter，John Hopkins researchers said on Wednesday.

The scientists said their study was the first to show that the central nervous system，reacting to environmental changes，may spark changes in the body’s immune system(免疫系统) that control the growth of tumors.They said if that was the case，a better understanding of how the process works eventually could lead to new cancer treatments.

Dr.Randy Nelson，an associate professor of psychology at Hopkins，stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day，the animals’ immune system and cancer.More work also would be needed to show that the findings could be applied to human cancer.

Dr.Faye Austin，an immunologist with the National Cancer Institute in Bethesda，said，“It’s a very intriguing observation that the length of exposure to light can affect the growth of a tumor.But I think that the draws really need further work to clarify the mechanics.”

But Austin said the findings were surprising and important，only because they open up a new approach for research.

Studies showed that stress weakened the immune system in animals.They figured that because winter is stressful，the season probably causes exertion (影响) on the immune system.

The researchers reasoned that animals that compensated by boosting (促进) their immune systems as winter approached would have a better chance of surviving and producing offspring.

“In the same way that animals have evolved to select the best time to breed，it struck me that animals ought to be able to predict when conditions would be challenging immunologically.”Nelson said.

1．Dr.Nelson has drawn a conclusion that ________.

A．there is a relation between the length of the day，the animal’s immune system and cancer

B．the findings of animals’ resistance to cancer can be applied to human cancer treatments

C．the length of exposure to light can affect the growth of a tumor

D．there is a new approach for studying the function of central nervous system in the body’s immune system

2．Which season can strengthen the immune system in animals?

A．Spring. 　　　 B．Summer.　　　 C．Autumn.　　　 　D．Winter.

3．On which of the following subjects can essays be presented at the meeting of the Society of Neuroscience?

A．The nervous system.

B．The treatment of cancer.

C．The ability to produce offspring.

D．The control of the growth of tumors.

 

完形填空

阅读下面短文，从A、B、C、D四个选项中选出最佳选项。

　　My wife and I spent a few weeks in London last year．We went there in the 　1　 We think it is the 　2　 season to visit England．The 　3　 is usually good 　4　 there aren't many 　5　 in October．

　　We 　6　 in small hotel in the West End．We 　7　 most of our sightseeing on foot．We went to 　8　 the places which all travellers see．We went shopping and spent 　9　 much money．　10　 we liked most going to the 　11　 We don't have the 　12　 to see such 　13　 plays at home．A lot of people say English 　14　 is very bad．We didn't think 　15　. it is 　16　 that most of the restaurants are French，Italian or Chinese，but we had some very 　17　 meals．

　　In fact，we 　18　 our boliday so much that we have already decided to go there again this year．We are going to take our umbrellas，　19　 I'm sure we will need 　20　 sometimes．

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As far back in history as we can tell , people have celebrated the start of a New Year. The people of ancient Egypt began their New Year in summer. That is when the Nile River flooded its banks bringing water and fertility（肥沃）to the land. The people of ancient Babylon and Persia began their New Year on March 21, the first day of spring . And some native American Indians began their New Year when the nuts of the oak trees became ripe. That was usually in late summer.

Noise-making is another ancient custom on the New Year. The noise is considered necessary to drive away the evil spirits of the old year. People around the world do different things to make a lot of noise. They may hit sticks together, beat on drums, blow horns, or explode fire-works.

　 Americans celebrate the New Year in many ways. Most do not have to go to work or school. So they visit family and friends, attend church services, share a holiday meal, or watch New Year’s parades（游行） on television. Most years university teams play in special holiday games. For those who have been busy at work or school, New Year may be a day of rest. They spend the time thinking about and preparing for the demands of the New Year.

1. Which of the following statements is right?

A. The people of ancient Egypt began their New Year in spring.

B. The people of ancient Babylon began their New Year on March 21, the first day of spring.

C. Some native American Indians began their New Year in early summer.

D. The people of ancient Persia began their New Year in late summer.

2. Why do people make a lot of noise on the New Year according to the passage?

A. The noise is considered necessary to frighten the evil spirits of the old year.

B. The noise is considered necessary to show people’s excitement.

C. They spend the time thinking about and preparing for the demands of the New Year.

D. People have no other better ways to show their happiness.

3. Americans celebrate the New Year by doing things as follows except___________ .

A. resting at home

B. visiting family and friends

C. attending church services

D. having sports and games