42.In the passage,the underlined word “they” refers to (所指)______.

A.wind and rain　　　　　　　　　　　　　　　　　　 B.cars

C.wind and gases　　　　　　　　　　　　　　　　　　　　 D.gases

41.This article tells us that acid rain is mixed by ______.

A.vinegar and wind　　　　　　　　　　　　　　　　　　

B.different gases and rain

C.vinegar and rain　　　　　　　　　　　　　　　　　　　　

D.many things and wind

40.If your friends can make your sorrow less,you have______.

A.friends who pity you　　　　　　　　　　　　　　　　　　　 B.friends in need

C.real friendship　　　　　　　　　　　　　　　　　　　　　　　　 D.table friends

B

One day I read an article about acid(酸雨)rain in a newspaper,I learned many things.Gases from factories and cars go up into the sky,the wind carries them far away.Later they come down with the rain in other places.That is acid rain.

Fish eggs and young fish are killed by even a little acid in the water.Today in some of the lakes there are no fish.

ada and some countries in northern Europe have the same problems. In Canada,for example,a lot of trees are dying because of acid rain.

At the end of the article the writer says,“When I look at these lakes in the year 2010,what I say and hear? Will fish jump again? Will birds sing their happy songs? Or will it be a silent spring?”

What should we do to stop acid rain? Is it too late now? No,I don’t think so.All of us should work together to stop acid rain.

39.In the second paragraph the writer implies(暗示) that______.

A.a friend in need is a friend indeed

B.those who have got help from their friends must be thankful

C.those who do a favor for their friends should not expect to get anything in return

D.we should not try to make use of our friends

38.Why is Aristotle mentioned in this passage?

A.Because what he said proved to be correct.

B.Because the writer agrees with him.

C.The writer does not think that Aristotle was right.

D.People believed in Aristotle.

37.According to this passage,we can guess that Aristotle was______.

A.a philosopher(哲学家)　　　　　　　　　　　　　　

B.a friend of the writer’s

C.a wise man　　　　　　　　　　　　　　　　　　　　　　　　　　　

D.a man who cared much for friendship

36.The main idea of the passage is that ______.

A.friendship can be divided into two types

B.the friendship for pleasure can’t last long

C.true friendship must be unconditional

D.true friendship must help each other

34.A.modern　　　　　　　　　　 B.earliest　　　　　　　　　　　　　 C.western　　　　　　　　　 D.free

33.A.added　　　　　　　 B.formed　　　　　　　　　　　　　 C.regular　　　　　　　　　　　　　 D.separate