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In the past, man did not have to think about protection of the environment. There were very few people on the earth, and natural resources seemed to be unlimited.
Today things are different. The world has become too crowded. We are using up our natural resources too quickly, and at the same time we are polluting our environment with dangerous chemicals. If we continue to do this, human life on the earth will not survive.
Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow on land. Yet, we continue to use more powerful machines to cut down more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die. However, in most countries waste is still put into rivers, but there are few laws to stop this.
We also know that if the population of the countries in the world is to rise at the present rate in a few years, there will not be enough food.
What can we do to solve these problems?
If we eat more vegetables and less meat, there will be more food available for everyone. Land that is used to grow crops can feed five times more people than land where animals are kept.
Our natural resources will last longer if we learn to recycle them.
The world population will not rise so quickly if people use modern methods of birth control.
Finally, if all of us think about the problem, we will have a better and cleaner planet in the future.
小題1:This passage mainly tells us about ______.

A．the problems we are facing today about environment and the ways to solve them

B．the unlimited natural resources in the world

C．our rivers are being polluted by waste from factories

D．the ways early man protected the environment

小題2: Which of the following is NOT true?

A．If we eat more vegetables, more food can be saved.

B．In the past, there was no need for people to think about environmental protection.

C．If we keep on cutting trees, forests will disappear.

D．We shouldn’t take more and more fish out of the sea, or there will soon be no fish left.

小題3:What is implied (暗示) in the passage?

A．Man is cleverer than any other animal.

B．Man will destroy himself if he doesn’t solve the problem.

C．Modern fishing methods are helpful in our fishing industry.

D．We should make more laws in order to survive.

小題4:From the passage we can see that the world’s natural resources ______.

A．will never be used up	B．are being polluted
C．are as plentiful as in the past	D．are being used up very quickly

小題1:A
小題2:A
小題3:B
小題4:D

試題分析：本文敘述了過去，人們不必擔心保護環境的問題。因為那時地球上人口稀少，自然資源似乎取之不盡。而現在世界變得擁擠異常。我們正在耗盡我們的自然資源，有毒化學制品的使用也正污染著環境。如果我們繼續這樣下去，地球上的生命將不復存在。
小題1:主旨大意題。全文敘述了我們面臨的環境問題要想出方法來拯救自己的星球的環境，故選A。
小題2:細節理解題。根據If we eat more vegetables and less meat, there will be more food available for everyone. 如果我們吃更多的蔬菜，并不是節省了食物，而是對于大家來說有更多的可使用的食物，故選A。
小題3:推理判斷題。根據If we continue to do this, human life on the earth will not survive.可推知如果人類不能解決環境這一問題，人類就等于毀了自己。故選B。
小題4:細節理解題。根據We are using up our natural resources too quickly, 世界的自然資源正在被利用地很快，故選D。
點評：所謂主旨大意題，就是指那些針對文章的主要內容、主題、標題或寫作目的所設置的問題。這類題主要考查同學們在理解全文的基礎上運用概括、判斷、歸納、推理等邏輯思維方法對文章進行高度概括或總結的能力。

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