Part Ⅱ Reading Comprehension (35 minutes)

Directions: There are 4 passages in this part.Each passage is followed by some questions or unfinished statements.For each of them there are four choices marked A),B),C) and D).You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center.

Questions 21 to 25 are based on the following passage:

Some radio singals were heard in 1967.They were coming from a point in the sky where there was unknown star.They were coming very regularly,too:about once a second,if they were controlled by clock.?

The scientists who heard the signals did not tell anybody else.They were rather afraid to tell in case they frightened people.The signals were coming from a very small body—no bigger,perhaps than the earth.Was that why no light could be seen from it?Or were the signals coming from a planet that belonged to some other star??There was no end to the questions,but the scientists kept the news secret.“Perhaps there are intelligent beings out there.”they thought,“who are trying to send messages to other planets,or to us?So the news was not given to the newspaper.Instead,the scientists studied the signals and searched for others like them...Well,all that happened in 1967 and 1968.Since then scientists have learnt more about those strange,regular,radio signals.And they have told the story,of course.

The signals do not come from a planet;they come from a new kind of star called a “pulsar””.About a hundred other pulsars have now been found,and most of them are very like the first one.?

Pulsars are strong radio stars.They are the smallest but the heaviest stars we know at present.A handful of pulsar would weigh a few thousand tons.Their light—if they give much light—is too small for us to see.But we can be sure of this,no intelligent beings are living on them.

21. The radio signals discussed in this passage____.?

A.were regular B.were controlled by a clock?
答案

1

短文大意

1967年人類收到了一些太空信號。這些信號來自太空中的某一恒星領(lǐng)域,它們極有規(guī)律,難道這是外星人向地球或我們發(fā)收的信號?為了不致在人們當(dāng)中造成恐慌,科學(xué)家們一直保守著這個(gè)秘密,并且一直對它們進(jìn)行研究。如今,當(dāng)然一切都真相大白。原來這些信號都來自一種叫脈沖星的恒星,它們的密度極大連光線也難以逃逸。但有一點(diǎn)可以確定,上面沒有智能生命存在。

21. 答案A。?

【參考譯文】 文中討論到的電磁信號……?

【試題分析】 此題考查考生“辨認(rèn)事實(shí)”的能力。?

【詳細(xì)解答】 見原文第一段,“They were coming very regularly,too.”他們同樣非常有規(guī)律,與 A)項(xiàng)同意。B)were controlled by a clock.由時(shí)鐘控制,原文前面有一表示“似乎的”連詞 if。C),D)根據(jù)下文判斷都不正確。 ?

22. 答案C。?

【參考譯文】 這些電磁信號來自于……?

【試題分析】 此題考查考生“根據(jù)已知信息進(jìn)行推斷”的能力。?

【詳細(xì)解答】 見原文第三段“...they come from a new kind of star called a “pulsar””他們來自一種叫脈沖星的新型恒星。 A) a satellite衛(wèi)星,B)a planet行星,D)當(dāng)時(shí)未知的智能生命。 ?

23. 答案C。?

【參考譯文】 科學(xué)家們沒有把有關(guān)電磁信號的事情告訴人們是因?yàn)椤��?

【試題分析】 此題考查考生“理解文章中某些細(xì)節(jié)”的能力。

?【詳細(xì)解答】 見原文第二段開頭“ The scientists who heard the singals did not tell anybody else.They were rather afraid to tell in case they frightened people.”聽到該信號的科學(xué)家未告訴別人,他們害怕這樣會驚嚇了老百姓。因此選擇 C。 ?

24. 答案A。?

【參考譯文】 脈沖星是……?

【試題分析】 此題考查考生“辨認(rèn)事實(shí)”的能力。?

【詳細(xì)解答】 見原文第四段,實(shí)際由“star”這個(gè)單詞就可排除B),C)和D)選項(xiàng)。

25. 答案D。?

【參考譯文】 以下說法,哪一個(gè)是正確的??

【試題分析】 此題考查考生“根據(jù)已知信息進(jìn)行推理”的能力。?

【詳細(xì)解答】 見原文第三段最后一句“About a hundred other pulsars have now been found...”因此D)項(xiàng)正確,其他各項(xiàng)均與原文意思不符。 ?

2

短文大意

本文主要討論的是沙漠?dāng)U張的問題。人們賴以生存的降雨及植被在不斷減少,地球上 40%的土地已成了沙漠或已沙漠化, 1/7的人口生活在干旱地區(qū),以及現(xiàn)代生活造成的一些問題使人類生存日益受到沙漠?dāng)U張的威脅。雖然科學(xué)家還未能徹底了解沙漠問題,但是一些保護(hù)土地的措施已被采用,人們在與沙漠抗?fàn)帯?

26. 答案A。?

【參考譯文】 本文主要談?wù)摰氖鞘裁??

【試題分析】 此題考查考生“把握文章主旨及大意”的能力。

【詳細(xì)解答】 全文主要闡述了沙漠?dāng)U散帶來的水源缺乏的問題,以及人們采取的措施。 A)符合該中心思想;B),C)和D)雖在文中提到過但作為主要思想,過于片面。 ?

27. 答案C。?

【參考譯文】 1/7指的是……?

【試題分析】 此題考查考生“理解文章中某些細(xì)節(jié)”的能力。

【詳細(xì)解答】 見原文第一段第三句“ About 628 million people -one out of seven-live in these dry regions.”大約628,000,000(約為1/7)的人住在這些干旱地區(qū)。C)項(xiàng)符合所指代的內(nèi)容,為正確答案。 ?

28. 答案C。?

【參考譯文】 在第二段中,“他們被送往南方的綠草地”,他們指的是……?

【試題分析】 此題考查考生“理解文章中某些細(xì)節(jié)”的能力。

【詳細(xì)解答】 見原文最后一句“ Some Sahel farmers still raise cattle on their poor farm land,but before the cattle are sold,they are taken to greener lands in the south to get fat”一些Sahel農(nóng)民在他們貧瘠的農(nóng)場上仍然飼養(yǎng)著牛群,但在把他們賣出之前,往往要送到南方多草的土地上以增肥。 they指代前面的the cattle。因此C為正確選項(xiàng)。 ?

29. 答案D。?

【參考譯文】 文中描述了幾種保護(hù)土地的創(chuàng)意??

【試題分析】 此題考查考生“根據(jù)已知信息進(jìn)行推斷”的能力。?

【詳細(xì)解答】 見原文第二段“...but there have been many ideas for saving the land.”但已有了許多保護(hù)土地的創(chuàng)意。以下各句即為例證,確定其數(shù)目為 3,因此D為正確選項(xiàng)。

30. 答案A。?

【參考譯文】 根據(jù)短文,以下說法,哪個(gè)是正確的??

【試題分析】 此題考查考生“辨認(rèn)事實(shí)”的能力。?

【詳細(xì)解答】 見原文第一段最后一句“Now largely through problems caused by modern life,their existence is threatened by the slow,steady spread of the earth's deserts.”現(xiàn)在由于現(xiàn)代生活產(chǎn)生的一些問題,他們生存日益受到地球沙漠逐步緩慢擴(kuò)散的威脅。因此A為正確選擇。B)中正確數(shù)目應(yīng)為one out of seven,C)應(yīng)是modern problems,D)文中未提及。 ?

C.were heard in 1967 only D.were secret messages ?

22. The radio singals were sent by____.?

A.a satellite?B.a planet?

C.a sky body which was unknown at that time?

D.intelligent beings who were unknown at that time ?

23. The scientists did not tell people about the signals because____.?

A.the singals stood for secret messages?

B.people would ask them too many questions?

C.they did not want to frighten people?

D.they stood for unimportant messages ?

24. A pulsar is____.?

A. a small heavy star which sends out strong radio signals and cannot be seen ?

B. a small heavy planet which sends out strong radio signals and cannot be seen ?

C. a small heavy satellite which sends out strong radio signals and cannot be seen

D. a small intelligent being who sends out strong radio signals and cannot be seen

25. Which of the following is true??

A.One of the pulsars found by scientists sends radio signals.?

B.Pulsar began to send radio singals in 1967.?

C.Scientists have searched for pulsars for many years but found none.?

D.Scientists have found many pulsars since 1967. ?

Questions 26 to 30 are based on the following passage:?

Over vast areas of every continent,the rainfall and vegetation necessary for life are disappearing.Already more than 40 percent of the earth's land is desert or desert?like.About 628 million people—one out of seven—live in these dry regions.In the past,they have managed to survive,but with difficulty.[ZZ(Z]Now largely through problems caused by modern life,their existence is threatened by the slow,steady spread of the earth's deserts.

Scientists still do not understand all the complex problems of the desert,but there have been many ideas for saving the land.Sandi Arabia has planted 10 million trees to help keep the sand from taking over fertile areas.The Israelis are aga in using some of the water collection systems left by the ancient people in the

Negev desert.They plan to water their orchards with the extra water.Some Sahel farmers still raise cattle on their poor farm land,but before the cattle are sold, they are taken to greener lands in the south to get fat.

26. What is the article mainly concerned??

A.The problem of spreading desert.?

B.The rainfall and vegetation in desert areas.?

C.The water collection systems.?

D.The difference between modern life and ancient life. ?

27. “one out of seven” refers to____.?

A.more than a third of the lands' earth?

B.the percentage of the earth's land that is desert-like?

C.the number of people who live in dry regions?

D.a day of a week ?

28. In paragraph 2,“they are taken to the greener lands in the south.”They

refers to____.?

A.the Sahel farm land B.the farmers?

C.the cattles D.the trees ?

29. How many ideas for saving the land are described??

A.Five. B.Two.?

C.Four. D.Three. ?

30. Which of the following statements is true, according to the passage??

A.The earth's desert are slowly spreading.?

B.One out of 10 people lives in dry regions.?

C.Their life in the desert is threatened now by traditional problems.?

D.New water wells can solve the problem in Africa's desert. ?