8．The earth is about 4，600million years old．Human beings has lived on the earth for only 35，000years，but during that time，we have changed our planet in many ways．Many of the things that we have done are good，but more are not good for the earth．
Water pollution
A lot of people，birds and fish die each day because of water pollution．Factories have polluted the land and the water．As a result，many rivers and lakes are now dead．
Air pollution
In big cities，factories，as well as cars，trucks and buses are the main cause of air pollution．Many people in cities now have serious health problems．For example，Mexico city used to be a beautiful sunny capital，but today it is always covered by thick brown clouds．
Soil pollution
In order to have a good harvest，most of the farmers use chemicals too much in their fields．That's bad for the soil．But this kind of pollution is difficult to stop．
Hope for the future
These problems are very serious for our future，so all of us should do something to improve our environment．If we can stop pollution，our planet will become more and more beautiful and our health will be better．Let's be greener people!
61．A have made the earth change a lot．
A．Human beings
B．Animals
C．Plants
D．People in other planets
62．There areB kinds of pollution in this passage．
A．two
B．three
C．four
D．five
63．Pollution isn't a big problem now，is it？A
A．Yes，it is．
B．No，it isn't．
C．Yes，there is．
D．No，there isn't．
64．Which sentence is NOT right according to the passage？A
A．Most of things that we have done are good for our planet．
B．We must stop the factories from pouring waste water into the rivers and lakes．
C．Because of water pollution，many rivers and lakes are now dead．
D．Water pollution is very serious nowadays．
65．Which sentence is RIGHT？B
A．Though Mexico city is always covered by thick brown clouds，it's still a beautiful sunny capital．
B．Air pollution can make people sick．
C．Now fewer farmers use chemicals in the fields．
D．Factories，cars，trucks and buses are the main cause of soil pollution．
分析 文章大意：這篇文章主要介紹了人類造成的三種污染：水污染；空氣污染和土壤污染對地球土環境造成的影響．倡議人們要停止污染保護我們的地球．
解答 61-65：ABAAB
61題答案：A 考查細節理解題，根據文中的第一段Human beings has lived on the earth for only 35，000years，but during that time，we have changed our planet in many ways可知人類在地球上生活了35000年，但在這段時間里，我們以許多方式改變了我們的星球，故答案A
62題答案：B 考查細節理解題，根據文中的第二、三、四段Water pollution：Air pollution：Soil pollution可知共三種污染，故答案B
63題答案：A 考查細節理解題，根據文中的最后一段These problems are very serious for our future，so all of us should do something to improve our environment可知這些問題對我們的未來很嚴重，所以我們應該做些什么來改善我們的環境，故答案A
64題答案：A 考查細節理解題，根據文中的第一段Many of the things that we have done are good，but more are not good for the earth．我們所做的許多事情都是好的，但更多的對地球不好．可知A錯誤，故答案A．
65題答案：B 考查細節理解題，根據文中的第三段Many people in cities now have serious health problems可知 現在許多城市的人都有嚴重的健康問題，所以B正確，故答案B
點評 本文是一篇日常生活類閱讀，題目涉及多道細節理解題，做題時結合原文和題目有針對 性找出相關語句進行仔細分析，結合選項選出正確答案．推理判斷也是要在抓住關鍵句子的基礎上合理的分析才能得出正確的答案．
