2018年6月份的英語四級考試即將開考，你復(fù)習(xí)得如何了？英語四級真題都好好做過了嗎？小編整理了英語四級真題的相關(guān)練習(xí)，一起來做做看吧！

　It was once thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic.Today,we know that although these are the areas with the worst air pollution，the problem is literally worldwide.On several occasions over the past decade，a heavy cloud of air pollution has covered the entire eastern half of the United States and led to health warnings even in rural areas away from any major concentration of manufacturing and automobile traffic.In fact， the very climate of the entire earth may be affected by air pollution.

　Some scientists feel that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels(coal and creating a“greenhouse effect”一holding in heat reflected from the earth and raising the world’s average temperature.If this view is correct and the world’s temperature is raised only a few degrees。much of the polar ice cap will melt and cities such as New Y0rk，Boston，Miami，and New Orleans will be under water.

　Another view,less widely held，is that increasing particulate matter in the atmosphere is blocking sunlight and lowering the earth’s temperature—a result that would be equally disastrous.A drop of just a few degrees could create something close to new ice age and would make agriculture difficult or impossible in many of our top farming areas.

　At present we do not know for sure that either of these conditions will happen，though one recent government report prepared by experts in the field concluded that the greenhouse effect is very likely.Perhaps，if we are very lucky,the two tendencies will offset each other and the world’s temperature will stay about the same as it is now.

56、According to the passage，people today think that air pollution________.

merely in urban and industrial areas

have an effect on the entire earth

widespread damage in the countryside

not so serious as it used to be

57、The“greenhouse effect”results from________.

concentration of carbon dioxide in the air

increasing particulate matter in the atmosphere

burning of firewood

blocking of sunlight

58、What does the author think of the possibility of a new ice age?

A.He rejects it as being ungrounded.

B.He holds the same view.

C.He is uncertain of its occurrence.

D.He thinks that would happen soon.

59、The word“offset” Line 3，________.

into

up with

up

up for

60、The passage is mainly about__________.

potential effect of air pollution

possibility of a new ice age

effects of global warming

causes of climate change

【參考答案】

?56-60 BACDA

好了，以上是小編整理的英語四級真題的閱讀理解部分（不含聽力與作文）。在選詞匯時一定要結(jié)合句子上下文仔細斟酌，注意辨析詞匯。每天學(xué)習(xí)一點點，堅持下去就會有收獲。如果自學(xué)吃力，不妨試試專業(yè)老師的指導(dǎo)，早日拿下四級。

備考課程推薦：大學(xué)英語四級高效備考班

懶人四六級，一周備考期！