D

　　In the atmosphere,carbon dioxide actd rather like a one-way mirror or the glass in the roof of a greenhouse which allows the sun's rays to enter but prevents the heat from excaping.

　　According to a weather expert's prediction,the atmosphere will be 3 warmer in the year 2050 than it is today, if man continues to burn luels at the present rate. If this warming up took place,the ice caps in the poles would begin to melt,thus raising sea level several meters and severely flooding coastal cities.Also，the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere(半球),psooicbly resulting in an alteration of earth's chief food growing zones.

　　In the past,concern about a man - made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet.But the weather experts are now paying more attention to West Antarctic,which may be affected by a warming on the scale that will possibly take place in the next fifty years from on burning of fuels.

　　Satellite pictures showthat large areas of Antarctic ice are already disappearing.The evidence available suggests that a warming has taken place.This fits the theory that carbon dioxide warms the earth.

　　However,most of the fuel is burnt in the northern hemisphere,where temperatures seem to be falling.Scientists conclude,therefore,that up to now natural influences on the weather have exceeded those caused by man.The question is:Which natural cause has most effect on the weather?

　　One possibility is the variable behavior of the sun.Astronomers at one research station have studied the hot spots and cold spots(that is,the relatively less hot spots) on the sun. As the sun rotates(旋转),every 27.5 days,it presents hotter or colder faces to the earth,and different aspects to different parts of the earth.This seems to have a considerable effect on the distribution of the earth's atmospheric pressure,and consequently on wind circulation.The sun is also variable over a long term:its heat output goes up and down in cycles,the latest trend being downward.

　　Scientists are now finding mutual relations between models of solar weather interactions and the actual climate over many thousands of years ,including the last Ice Age.The problem is that the models are predicting that the world should be entering a new Ice Age and it is not.

　　One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inertia(不活动，惰性) of the earth's climate.If this is right,the warming effect of carbon dioxide might thus be serving as a useful counter balance to the sun's diminishing heat.

　　68.It can be concluded that a concentration of carbon dioxide in the atmosphere would ___.

　　　A.mean a warming - up im the Arctic

　　　B.raise the temperature of the earth's surface

　　　C.prevent the sun's rays from reaching the earth's surface

　　　D.account for great changes in the climate in the northern hemiphere

　　69.Although the fuel consumption is greater in the northern hemisphere,temperatures there seem to be falling.This is _______.

　　　A.mainly because the levels of carbon dioxide are rising

　　　B.partly due to variations in the output of solar energy

　　　C.possibly because the ice caps in the poles are melting

　　　D.exclusively due to the effect of the inertia of the earth's climate

　　70.On the basis of their models,scientists are of the opinion that ________.

　　　A.the climate of the world should be becoming cooler

　　　B.the new Ice Age will be delayed by the greenhouse effect

　　　C.the man - made warming effect helps to increase the solar effects

　　　D.it will take thousands of years for the inertia of the earth's climate to take effect

第Ⅱ卷（共35分）

第四部分写作（共两节，满分35分）

第一节短文改错（共10小题，每小题1分，满分10分）

　　假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语文错误，每句中最多有两处。错误涉及一个单词的增加、删除和修改。

　　增加：在缺词处加一个漏字符号（∧），并在其下面写该加的词。

　　删除：把多余的词用斜线（）划掉。

　　修改：在错的词下划一横线，并在该词下面写出修改后的词。

　　注意：1.每处错误及其修改均仅限一词；

　　　　　2.只允许修改10处，多者（从第11处起）不计分。　　

　　A concert was given to several famous singers last Saturday.Tickets were very hardly to get. Since I enjoyed attending that concert,I bought one at the hight price. For the first half hour the concert went on smooth.The nice shows of the stars singers were warmly welcomed by the listeners.Many of them couldn't help burst into tears.Before long the microphone went wrong.Some people began to make voice. The members of the theatre tried to keep in order, but failed. They had difficulty in continuing the concert.Thus, a perfectly good concert caused to be no value by some uneducated people.

第二节书面表达（满分25分）

题目要求：假设你是李平，你参与了你所在学校学生会组织的一次“What is a good teacher?”的讨论。请根据以下你自己所填写的表格中提供的信息，向校刊编辑部写一封信，表明你对优秀教师应具备的标准的看法。此信要求在100-130词之间，信的开头与结尾已写好，你只需要继续写下去。

Dear Editor,

　　I am Li Ping.All my classmates and I are interested in the discussion about "What is a good teacher?" organized by the students' union. In my opinion,the criteria of a good teacher include

_______________________________________________________________________________

_______________________________________________________________________________

　　By the way,I like this activity very much. Thank you.

Yours sincerely,

Li Ping

第二部分语言知识及应用（共两节，满分45分）

第一节单项填空（共15小题，每小题1分，满分15分）

　　从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

In ______ China Youth Daily survey of over 45,000 people,which was conducted last month,62.8% said ______personal appearance can increase opportunities for promotion.

　　　A.不填，不填 B.不填，the C.the,不填 D.the,a

China successfully held the 29th Olympic Games,fulfilling the promise Beijing ______ in its Olympic bid.

It ______ long befor the Chinese Space Center ______ Shenzhou VII Spacecraft,becoming the third country to send an astronaut to "walk" in space after the United States and the former Soviet Union (now Russia).

Color - blind people often find it difficult to ______ between red and green.

.Many parents think it will be of great use for their children to ______ from home and earn their own living.

.---Let's go to the seaside for fresh air,OK?

---_______.　　　

---Mum,the soup is too salty.You ______ a lot of salt in it.

---Oh,dear! I put much salt instead of sugar in it.