Question

Passage structure(篇章结构)

下面是一篇杂志文章，请将标有A－F的段落插入文章中标号为1－5的合适位置，使这篇文章意义完整，结构连贯；其中有一个段落是多余的。

　　Every year more and more plants and animals disappear never to be seen again．

　　1．________

　　Every day, thousands of species(种类)of animals draw closer to extinction(灭绝)．There are countless numbers of species which may become extinct before they are even discovered．

　　2．________

　　The problem is acid(酸)rain．Acid rain is a kind of air pollution．

　　3．________

　　The rain in many places isn’t natural and clean any more．It’s full of acid chemicals．

　　4．________

　　But dead fish may be just the beginning of the problem．Scientists are finding other effects of acid rain．

　　5．________

　　Now scientists are also beginning to study the effects of acid rain on larger animals．For example, they believe that some deer in Poland are less healthy because of acid rain．If deer are hurt by the rain, what about people?This is the question many people are beginning to ask．No one knows the answer yet．But it is an important question for us all．

A．Seldom does it rain and there is little fresh water here for the fish．A series of development projects has destroyed the natural environment．Waste of different kinds can be seen here and there．This has caused a serious problem for fish and other animals living around．

B．In some large areas trees are dying．Not just one tree here and there, but the whole forests．At first scientists couldn’t understand why．There were no bugs(虫)or diseases in these trees．The weather was not dry．But now they think that the rain was the cause．Acid rain is making the earth more acidic in these areas．Some kinds of trees cannot live in the soil that is very acidic．

C．When it falls in lakes, it changes them too．The lakes become more acidic．Acid water is like vinegar(醋)or lemon juice．It hurts when it gets in your eyes．It also kills the plants and animals that usually live in lake water．That is why the fish are dying in lakes．

D．It is caused by factories that burn coal or oil or gas．These factories send smoke into the air．The wind often carries the smoke far from the factories．Some of the harmful substances(物质)in the smoke may come down with the rain hundreds of miles away．

E．Strangely, it is the most intelligent(聪明的)but most thoughtless animal that is causing most of the problems－man．Nature is very carefully balanced(平衡的)and if this balance is disturbed(破坏)，animals can disappear surprisingly fast．

F．In many lakes the fish are dying．Fishermen are worried because every year there are fewer fish and some lakes have no fish at all．Scientists are beginning to get worried too．What is killing the fish?

Answer 1

答案：1．E;2．F;3．D;4．C;5．B