The temperature of the sun is over 5000 degrees Fahrenheit at the surface, but it rises to perhaps more than 16 million degrees at the center．The sun is so much hotter than die earth that matter can exist only as a gas, except at the core．In the core of the sun, the pressures are so great against the gases that, despite the high temperature, there may be a small solid core．However, no one really knows, since the center of the sun can never be directly observed．
Solar astronomers do know that the sun is divided into five layers or zones．Starting at the outside and going down into the sun, the zones are the corona, chromosphere, photosphere, convection zone and finally the core．The first three zones are regarded as the sun's atmosphere．
But since the sun has no solid surface, it is hard to tell where the atmosphere ends and the main
body of the sun begins．
The sun's outermost layer begins about 10000 miles above the visible surface and goes outward for mllions of miles．This is the only part of the sun that can be seen during an eclipse（日食） such as the one in February 1979．At any other time, the corona can be seen only when special instruments are used on cameras and telescopes to shut out the glare of the sun's rays．
The corona is a brilliant, pearly white, filmy light, about as bright as the full moon．Its beautiful rays are a sensational sight during an eclipse．The corona's rays flash out in a brilliant fan that has wispy spikelike（一束束穗状） rays near the sun's north and south poles．The corona is thickest at the sun's equator．
The corona rays are made up of gases streaming outward at tremendous speeds sad reaching a temperature of more than 2 million degrees Fahrenheit．The rays of gas thin out as they reach the space around the planets．By the time the sun's corona rays reach the Earth, they are weak and invisible．
1.Matter on the aim can exist only in fee form of gas because of the sun's ___．
A．size B．．age C．location D．temperature
2.All of the following are parts of the sun's atmosphere EXCEPT the ___．
A．corona B．chromosphere C．photosphere D．core
3.According to the passage, as the corona ra5,'s reach -die plaasts, they become ___．
A．hotter B．clearer C．thinner D．stronger
4.Which of 'die following do the paragraphs following the passage most likely discuss?
A．The remaining layers of the sun．
B．The evolution of the sun to its present form．
C．The eclipse of February 1979．
D．All the above．
What is the purpose of the World Games? What's the difference between the World Games and the Olympic Games?
_50 _the Olympic Games, the World Games have a rather _51_ history．In 1981, the first World Games were held in Santa Clara．Since then, in the year following the Olympics, some of the world's best athletes _52_ in their common search for _53_ at the world Games．
There are usually 25 to 35 _54_ at the World Games, The events at the World Games are not part of the Olympics or ones were part of the Olympic Games．Many events at the World Games _55_ as Olympic events, like weightlifting and badminton．They got their start as events at the World Games _56_ being moved into the Olympics．Just like the Olympics, the World Games also have _57_ competitions．These competitions get the sport the chance to be seen and the chance to become medal events．
The World Games are _58_ tied to the Olympic Games because the International Olympic Committee is the sponsor of the International World Games Association．The International Olympic Committee has decided that the number of Olympic participants is _59_ 10,500．The new policy means that no World Games competitions will be _60_ the Olympics any time soon．
This year, the World Games were held in Taiwan．Some events, like softball, _61_ be Olympic sports but were dropped and now are _62_ for the World Games．The World Games look like a perfect supplement and _63_ ground for future Olympic Games．So next time you get a chance to watch the World Games, you may want to pay attention as it could be the future, or maybe even _64_．
1.A．As for B．But for C．Because of D．Compared with
2.A．early B．young C．long D．ancient
3.A．unite B．lie C．result D．participate
4.A．fame B．excellence C．wealth D．knowledge
5.A．games B．sports C．events D．matches
6.A．end up B．start on C．break off D．come up
7.A．after B．since C．before D．unless
8.A．international B．intense C．fair D．exhibition
9.A．loosely B．somewhat C．closely D．partly
10.A．amounted to B．limited to C．added to D．reduced to
11.A．moved into B．engaged in C．held in D．established in
12.A．had to B．seemed to C．happened to D．used to
13.A．good B．available C．helpful D．convenient
14.A．competing B．playing C．training D．camping
15.A．focus B．truth C．hope D．history
Directions; Complete the following passage by using the words in the box．Each word can only be used once．Note that there is one word more than you need．
A．survey B．off C．better D．care E．conducted
F．differed． G．personal H．prepared I．contrast J．differences,
GAN Xiaolin, 18, only gets half a day __1.__ school every week since the Hubei student started senior high school．Every day, he takes core （核心的） courses from 7:10 am to 10:30 pm．
Sometimes, Gan feels extremely stressed from the heavy workload．But he hopes that his three
years of hard work toward the college entrance examination will change his life for the _2._．
Gan is a typical Chinese student, as shown m a recently released survey．The new survey, which was __3.__ by the China Youth and Children Research Center and other foreign institutions, polled（调整） about 4,000 high school and vocational school students in China, Japan, the United States and South Korea．
The five biggest frustrations listed by all the young people were: an over-busy school life, an empty_4.__ life, dissatisfaction with their appearance, a lack of time for exercise and friends, and no spare money．
Although some of the teenage problems were y-niversai, there were big _ _5._ between the students when it came to the time they spent on sehoolwork．
For example, Chinese students spent the most time at school and on homework．Nearly 80 percent of them spent at least eight hours a week in school, and 56．7 percent spent two or more hours on their homework．By_6., only about 25 percent of US students, 20,5 percent of Japanese students, and 15 percent of Korean students had more than two hours of homework each night．
The responses from the Chinese students also _7._ significantly from their peers （同龄人）
in the other three countries when asked about their life goals．
Only 16．7 percent of Chinese students said that they didn't __8._ much about their future, while the figure for that category was 72．4 percent for US students, 59．1 percent for the Japanese and 58．2 percent for the South Koreans．The _9. found that Chinese students were more motivated than the other students to work hard for a better life．
San Diego's Zoo and Sea World are places where residents and visitors alike can enjoy r animals and plants in shows and exhibits, __ _ in part by San Diego's climate.
A．made it possible B．making it possible
C．making possible D．made possible
Not until all the fish died in the river how specious the pollution was.
A．did the villagers realize B．that the villagers realized
C．the villagers did realize D．didn’t the villagers realize
To help a friend solve the problem troubling him, .
A．a friend should be made known of his difficult situation
B．a man should be equipped with the kind of knowledge required
C．nothing is better than offering of knowledge required
D．keeping one’s promises is most important
