JINTAN,JTANGSU:The 20 students 18 boys and 2 girls — had a thousand reasons to be proud of themselves. They had just climbed their way to the top rung(阶梯) out of 4 million students taking part in the Fifth National Hua Luogeng Gold Cup Mathematics Contest (竞赛)Tuesday evening.

　　The 20 gold medal winners are all primary and middle school students under the age of 14.

　　‘Many of the problems are of college level and these pupils can figure them out. It is just unbelievable! ‘said a teacher from Guangdong province.

　　Named after China’ s most famous mathematician, Hua Luogeng, the contest started in 1986, one year after his death. In less than 10 years, it has been recognized by the State Education Commission (国家)as the country’s biggest and best contest of its kind.

1. This news story is mainly about .

　　A. when the contest started

　　B. how the contest got its name

　　C. the 20 pupils who have won gold medals in the contest

　　D. the 5th National Hua Luogeng Gold Cup Mathematics Contest

2. This news story most probably appeared in a news paper in .

　　A.1995　　B. 1987　　C. 1986　　D. 1997

3 Ii can be inferred from the text that the teacher from Guangdong province .

　　A. felt proud of the gold medal winners

　　B. wondered if the students were honest

　　C. thought that the problems were too difficult for the 　students

　　D. believed that the twenty winners could go to study at university

4 The underlined phrase ‘figure out’ in the text means .

　　A .guess　　B. add up　　C. work out　　D. study

　　From the very beginning, Martin felt that he was bound up with（与……紧紧地在一起）his lovely little patient. One day, following some tests , Betty gave the doctor a big hug（拥抱）.

　　A few months later the doctor removed not only the tumour（肿瘤）, but also the entire lower left side of Betty’s gum（牙龈）and jawbone. Because Betty was so young, Martin was hopeful that her jawbone might regenerate.

　　Within three months, Betty’s tumour grew as large as an orange, changing the natural appearance of the left side of her small, delicate （ = thin; not strong）face. Soon she couldn’t even close her mouth, and as her eating problems worsened, Betty ‘s weight dropped from 20 kilos to 15. Martin knew from experience that it might invade the brain.

　　The only other possibility was thorough radiation therapy （放射疗法）. Night after night, Betty's father gave her injection, but the tumour remained as big as ever. Then one evening. Morgan noticed that the tumour had begun to change. It was actually becoming smaller! For two months her tumour appeared to be going away for ever. In the coming months, Betty’s tumour continued to appear. She was able to eat solid food once again. Her jawbone was regenerating. The tumour was gone.

　　67．What do you think the underlined word regenerate means? It means “________”.

　　A. lose one’s life

　　B. give a new life to

　　C. be made by hand

　　D. pass on from one generation to another

　　68．If Betty’s jawbone didn’t regenerate, the doctors ________ .

　　A. would rebuild her jaw

　　B. would continue the treatment

　　C. would use new medicine

　　D. could do nothing else

　　69．If the brain should be invaded, the result would ________.

　　A. prevent her growth

　　B. reduce her weight

　　C. cause her brain damaged

　　D. affect her eyesight

　　70．What did the doctors do two months later?

　　A. They continued their observations.

　　B. They gave up the operation on Betty.

　　C. They found out what caused Betty’s strange disease.

D. They declared that Betty’s strange disease was cured.

Many of the world's pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further　 1　 by industry.

If the rapid increase of world 　 2　 continues at the present rate, there may be much greater

　 3　 to human beings.

Some scientists　 4　 of the increase in numbers of people as "population pollution''.

About 2,000 years ago, the world population was about 250 million. It　 5 a billion in 1850. By 1930 the population was two billion. It is now six billon.

It is　 6 to double by the year 2020. If the population　 7　 to grow at the same rate, there will be 25 billion people in the　 8 a hundred years from now.

Man has been　 9　 the earth's resources more and more　 10　 over the past years. Some of them are almost gone.

Now many people believe that man's 　11 problem is how to control the　 12　 of the population.

The material supplies in the world will be far from enough to　 13 the human population if the present rate of increase continues.

There is already over-crowding in many cities and 　14 in some countries. Many people believe that human survival in the future 　15 on the answer to the question.