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

第四部分：写作（共两节，满分40分）

第一节  完成句子（共10小题；每小题1.5分，满分15分）

阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子，并将答案写在答题卡上的相应题号后。

71．——Has Li Lei finished his work today?

——I have no idea, but he ___________________（做实验） when I saw him this morning．(conduct)

72．——They aren’t quiet, are they?

   ——No. They are accustomed ___________________（不说话） at meals.(talk)

73．From the distance ___________________（来了一个士兵） who was riding a horse. （come）

74．It is a rule in our school that no books ___________________（带出）unless you have a library card. (take)

75．The news spread quickly through the village ___________________（战争已结束）, making villagers wild with joy. (end)

76．The local Tibetans laughed at the strange bottles containing ___________________（他们称之为） “English air”. (refer)

77．Misunderstandings arising from lack of social communication，unless __________________（处理恰当），may lead to serious problems．(handle)

78．——I felt it very difficult to carry on the work all by myself.

——I could have helped you, but you ___________________（没有要求我）. (ask)

79．Turesson’s findings show that habitat, such as soil conditions, ___________________（同等重要）to the output of crops. (significance)

80．Willie has complained to the sales manager about the PC he bought ___________________（其屏幕爆炸）for no reason yesterday. (explode)

B) 阅读下面的短文，根据首字母的提示在空白处填上适当的单词，使短文意义完整。(For questions 71—80, read the passage below. Complete it by filling in each blank one word. The first letter of each word is provided.)
The Home of the Future
When Dan Green comes home from work, he doesn't need a key to open his front door. As he walks up to the front of his house, the (71)d________ opens. The lights turn on inside. His favorite music starts to play. His dinner is (72)r________ in the oven. (73)B________ no   one   is   home.   What's happening? This is the home of the future! Right now, Dan Green is the  only  person (74)w________ has a home like this. He is a scientist. But  in  about  25 years, many  people (75)w________ have homes like Dan's. His  home  does  not  look different on the (76)o________. But inside it is very different.
Computers control this house of the  future. For (77)e________, Dan  is  watching  television  (78)w             the doorbell rings. The TV is a computer. When Dan presses a button on the TV remote control, he can see  a picture of his (79)v________ on  the  screen. He  can  also  use  the remote control to open or close the door. Dan can watch TV and answer the door at the same   (80)t________.

1. The Video Camera Pen

Item 78431; $129.95

Available for Immediate Shipment

Order by Phone: 1-800-321-1484

                                    This is the pen that has a built-in video camera, capturing videos or still images with a click of its button. Ideal for use while secured in a pocket, it can capture up to five hours of video and up to 20,000 images. Its battery provides up to two hours of power before requiring a recharge.

2. The Wristwatch Camcorder

Item 78098; $149.95                          

Available for 3-day shipment

Order by Phone: 1-800-321-1484

                                  This is the men’s watch with an unnoticeable camcorder, so you’ll always have a camera ready to capture a chance famous person or a pet’s ridiculous actions. The camera is located at the two-o’clock position,

                      yet the watch’s hands never make it covered. The camera’s rechargeable battery provides up to two hours of use from a four-hour charge.

3. The only 55 Inch Widescreen Personal Movie Theater

Item 77918; $249.95

Available for Immediate Shipment

Order by Phone: 1-800-321-1484

                                  This is the only personal media viewer that provides a

private viewing experience just like watching a widescreen 55 inch television from 10 meters away. It connects to a video iPod, iPhone, portable DVD player. Includes two AA batteries that provide up to six hours of continuous operation and iPod cable.

4. The Digital Phone Album Watch

Item 77281; $99.95

Available for Immediate Shipment

Order by Phone: 1-800-321-1484

                                  This is the watch that vividly displays 120 of your favorite digital photographs. You can download digital photographs to the watch. The watch can be viewed in the Photo Album mode(time and photo view) or digital mode (time and date view). A six-hour charge provides up to 10 days of use.

1.What’s the purpose of this passage?

   A. To compare some creative inventions.    B. To advertise some unique goods.

   C. To teach how to operate the items.       D. To show how fashionable the items are.

2.What do Item 78431 and Item 78098 have in common according to this passage?

   A. They both sell well.                                B. They are both cheap.

   C. They both have unusual appearances.     D. They both can take photos.

3.If you’re a movie fan, you probably show strong interest in ________.

   A. The Video Camera Pen             

B. The Wristwatch Camcorder

   C. The only 55 Inch Widescreen Personal Movie Theater

   D. The Digital Phone Album Watch[来源:]

4.Which of the following is TRUE according to the passage?

   A. In fact, Item 78098 cannot tell time.

   B. Item 77918 works as a DVD player.

   C. In a way, Item 77281 is user-friendly.

   D. All the items include rechargeable batteries.

Dear Kind-Trustee-Who-Sends-Orphans-to-College,
Here I am! I traveled yesterday for four hours in a train．It’s a funny feeling, isn’t it? I never rode in one before．
College is the biggest, most puzzling place—I get lost whenever I leave my room. I will write you a description later when I'm feeling less confused; also I will tell you about my lessons. Classes don't begin until Monday morning, and this is Saturday night. But I wanted to write a letter first just to get acquainted.
It seems strange to be writing letters to somebody you don't know. It seems strange for me to be writing letters at all—I've never written more than three or four in my life, so please overlook it if these are not a model kind.
Before leaving yesterday morning, Mrs. Lippett and I had a very serious talk. She told me how to behave all the rest of my life, and especially how to behave towards the kind gentleman who is doing so much for me. I must take care to be very respectful.
But how can one be very respectful to a person who wishes to be called John Smith? Why couldn't you have picked out a name with a little personality? I might as well write letters to Dear Flagpole or Dear Clothes-line.
I have been thinking about you a great deal this summer; having somebody take an interest in me after all these years makes me feel as though I had found a sort of family. It seems as though I belonged to somebody now, and it's a very comfortable feeling. I must say, however, that when I think about you, my imagination has very little to work upon. There are just three things that I know: I, You are tall. Ⅱ. You are rich. Ⅲ. You hate girls.
I suppose I might call you Dear Mr. Girl-Hater. Only that's rather rude to me. Or Dear Mr. Rich-Man, but that's rude to you, as though money were the only important thing about you. Besides, being rich is such a very external quality. Maybe you won't stay rich all your life; lots of very clever men get broke in Wall Street. But at least you will stay tall all your life! So I've decided to call you Dear Daddy-Long-Legs. I hope you won't mind. It's just a private pet name we won't tell Mrs. Lippett.
The ten o'clock bell is going to ring in two minutes. Our day is divided into sections by bells. We eat and sleep and study by bells. It's very lifeful. There it goes! Lights out. Good night.
Observe how precisely I obey rules--due to my training in the John Grier Home.
Yours most respectfully,
Jerusha Abbott
to Mr. Daddy-Long-Legs Smith
【小题1】Jerusha felt “confused” because ______.