The earth is 4 600 million years old. We humans have lived on earth for only 35 000 years, but during this period we have changed our planet a lot in many ways. Some things we’ve done are very good for the earth while some are bad.
All over the world, people have cut down millions of trees. When it rains or when the wind blows, the earth is taken away. Forests have become deserts, so more and more sorts of animals and plants are disappearing.
In big cities, cars and buses have polluted the air. Many people in cities now have health problems.
Factories have also polluted the land and the water. As a result, many rivers and lakes are now dead.
Around the earth, there’s a special kind of oxygen called “ozone”(O3). It is important to the earth. But now air pollution is destroying it and that has made a very big hole in the ozone layer. Too much harmful radiation from the sun passes through the hole and reaches the earth directly. This is very dangerous because this kind of radiation can cause cancer.
Carbon dioxide (CO2) in the air has increased a lot. It mainly comes from burning oil, coal and wood. This has formed a “blanket” around the earth. The heat from the sun can’t escape so the temperature is rising. This is called “the greenhouse effect”. It causes the level of the oceans to rise and the climate of the earth to change.
All these problems are very serious, so we must do something now.
根据短文内容,从题中所给的A、B、C、D四个选项中选择最佳答案。
1.What does our planet mean here?
A. The sun. B. Mars.
C. The moon. D. The earth.
2.In the passage, “blanket” refers to_______________.
A. carbon dioxide around the earth
B. the ozone layer in the sky
C. the forests around the world
D. pollution all over the world
3.The level of the oceans is rising because of _______.
A.pollution
B. few trees
C. the greenhouse effect
D. changes in the climate
4.Which is NOT true?
A. Cars can pollute the air.
B. Factories can pollute the water.
C. The fewer trees, the better.
D. Not all the things we have done are good for the earth.
5.What is the best title for this passage?
A. Environmental Problems
B. Pollution on the Earth
C. Hope for the Future
D. The Greenhouse Effect
完形填空。
Canada is the second largest country in the world. It is over 7 000 kilometers from the______ coast to the east. It ______ six time zones. ______ it is 9 a.m. in Vancouver on the west coast, it is 1:30 p. m in Saint John on the east coast.
English and French ______ the two main languages in Canada. About 60 percent of ______ population speak French. More ______ 70 percent of its population live in cities near the U.S. border(边境).
Ottawa is the capital. Every year millions of tourists go there to ______ museums and take part in the cultural(文化的)activities. Toronto is the largest city of the country ______ about 2.5 million people. Montreal is ______ second biggest French-speaking city in the world.
The maple (枫树) leaf is the national symbol of Canada. The Canadian flag has a red maple leaf on a red ______ white background.
1.A. west B. east C. south D. north
2.A. is B. had C. has D. have
3.A. Which B. What C. Where D. When
4.A. are B. is C. will be D. has been
5.A. their B. his C. its D. our
6.A. up B. over C. about D. than
7.A. saw B. visit C. look D. find
8.A. with B. for C. from D. at
9.A. a B. an C. the D. 不填
10.A. or B. and C. but D. however
情景交际。
从方框中选出适当的句子补全对话,其中有两项是多余的。
Lily: Why are you unhappy, Tom?
Tom: _____1.______It’s hard for me to learn English.______ 2.______
Lily: Yes, I’d love to. What’s your problem?
Tom: ________3._________
Lily: Don’t be shy. You should be brave and believe in yourself. You can often go to the English
Corner to practice your oral English. Once you say out loud what you learn, you won’t
easily forget it.
Tom: Really? I will try that way._____ 4.______
Lily: I often read English stories and novels. They not only improve my reading but also
enlarge my vocabulary. Reading is important way to learn English well.
Tom: ______5._______But I am still…
Lily: Cheer up. You can do a good job.
Tom: OK,I will do as you said and never give up.
A. My pronunciation is poor. B. I did badly in the English exam. C. Thank you for your advice. D. Then, how do you improve your reading? E. Could you help me with it? |
— Have you _____ had dumplings?
— No, not _____.
A. ever; yet B. ever; ever C. yet; yet
We have finished ______of the work. We will have to finish the rest tomorrow.
A. two three B. two thirds C. two third
— Shall we go to see the wonderful movie this afternoon?
— ____
A. You’re great! B. Great! C. Thank you.