Question

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

Answer

1.D

2.A

3.C

4.C

5.A

【解析】

试题分析：本篇短文介绍了对地球造成破坏的两个问题：臭氧层被破坏和温室效应，提倡大家保护地球。

1.1】D细节理解题。根据文章内容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.可知我们的星球指的是地球。故选D。

2.2】A细节理解题。根据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.可知blanket是指的二氧化碳。故选A。

3.3】C细节理解题。根据文章内容This is called “the greenhouse effect”. It causes the level of the oceans to rise and the climate of the earth to change.可知，这就是所谓的“温室效应”。它会使海洋的水平面上升，改变地球的气候。根据句意，故选C。

4.4】C细节理解题。根据文章内容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.可知并不是树越来越少，越好。故选C。

5.本篇短文介绍了对地球造成破坏的两个问题：臭氧层被破坏和温室效应，提倡大家保护地球。故选A。

考点：考查环保类短文阅读。