19. Mountaineering is a sport, not a game because　　　 .

A. it has man-made rules　　 B. it is too dangerous for climbers

C. it can't bring people joy and leisure

D. it is free for climbers to use their own methods

18. The underlined word "passion" (Para. 2) could best be replaced by　 　　　　.

A. strong emotion　　 B. enthusiasm　　 C. feeling　　 　　　 D. affection

17. What movements are popular among people in winter in the passage?

A. Soccer and golf. 　B. Skiing and skating.　 C. Cycling and hockey.　 D. Mountaineering.

16. It can be inferred from the passage that 　　　　.

A. no measures can be taken to regulate the home: school education

B. most parents are not satisfied with public education

C. it is wiser for schools to accept enrollment part time

D. the home-schooled have no difference with those in public schools

E

Most ,young people enjoy some form of physical activity. It may be walking, cycling, or swimming, or in winter, skating or skiing. It may be a game of some form-football, basketball, hockey, golf or tennis. It may be mountaineering,

Those who have a passion for climbing high and difficult mountains are often looked upon with astonishment. Why are men and women willing to suffer cold and hardship, and to take risks in high mountains? This astonishment it caused, probably, by the difference between mountaineering and other forms of activity to which men give their leisure.

Mountaineering is a sport and not a game. There are no man-made rules, as others, as there are for such games as golf. and football. There are, of course, rules of different kind which it would be dangerous to ignore, but it is this freedom from man-made rules that makes mountaineering attractive to many people. Those who climb mountains are free to use their own methods.

If we compare mountaineering and other more familiar sports, we might think that one big difference is that mountaineering is not a "team game". We should be mistaken in this. There are, it is true, no "matches" between "teams" of climbers, but when climbers are on a rock face linked by a rope on which their lives may depend, there is obviously teamwork.

The mountain climber knows that he may have to fight forces that are stronger and more powerful than man. He has to fight the forces of nature. His sport requires high mental and physical qualities.

A mountain climber continues to improve in skill year after year. A skier is probably past his best by the age of thirty. But it is not unusual for men of fifty or sixty to climb the highest mountains in the Alps. They may take more time than younger men, but they perhaps climb with more skill and less waste of effort, and they certainly experience equal enjoyment.

15. According to Mrs Brown, the purpose of teaching her children at home is　　　 .

A. looking after them by herself　　 B. teaching them what they like

C. helping her to do housework　　 D. teaching them more basics

14. The important problem of home-school education is　　　 .

A. lack of social activities　 B. lack of strict management

　 　C. inefficiency in study　 　D. low teaching quality

13. We can know from the passage that　　　 .

　　 A. half the parents feel doubtful about public education

　　 B. most parents have religious consideration

　　 C. some parents want to escape the compulsory education

　　 D. public schools should not interfere in private education

12. The education experts worry about　　　 .

A. whether home-schooling affects the general level of education

　　 B. whether the children studying at home need help

　　 C. whether the family education should 'be abandoned

　　 D. whether parents use the right methods to teach children

10. What can researchers know through studying family trees?

A. The circumstances of the recurrence of the disease.

B. The genetic samples of progeria sufferers.

C. Chromosome faults of progeria suffers.　 D. The method of overcoming progeria.

ll. What do we know from the news that NIH brought to Sam's parents?

A. This incurable disease finally was overcome.

B. Different children have different chromosome faults.

C. It is possible to find the cure of the rare disease.

D. All the people have the same chromosomes.

D

About 2 percent of American students are now taught at home. Educators are confused about how this growing practice should be regulated, and also wonder whether children who are not fully registered in school should get some public services. The issue shows how dim the line between public and private education can become, even when that private education is delivered at home.

Probably about half the parents who teach at home are religiously motivated and use lessons by mail (or Internet) from church schools.　 Perhaps an additional fourth have some doubts about public education, think schools are unsafe of the fact that their children　 have special need that regular schools don't meet, In some cases, parents home-school to escape compulsory (义务的) education; they do least teaching while having older children care for younger sisters or brothers or work in home businesses. Although .children often learn well at home weak regulations in most states mean that officials rarely challenge or monitor parents who say they are home-schooling. With glowing frequency, however, public schools offer services to the home-schooled. Districts may permit them to enroll part time for instance; educators fear that otherwise these children could later return full time with serious academic weaknesses,　 and in any case some districts wanting to qualify for state aid can benefit from part-timers filling empty seats.

Here in Helena, Mary Brown has taught her 12 children at home while manufacturing clothing there in her non-teaching hours. Mrs Brown says her motive is to give more training in basics, like phonics (发音学) than public schools offer.　 Most of her curriculum is from a church school, with tests returned by mail.

Two years ago her seventh child, Andrea, wanting to join regular athletic programs, enrolled at Capital High School. Andrea soon changed her mind and continued home study. But she had liked gym and chorus, so Mrs Brown asked that she be allowed to continue in them while taking other courses at home.