英語四級閱讀練習題答案解析
英語四級閱讀練習題1：
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
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.
英語四級閱讀練習題答案解析：
21. 答案A。見原文第一段，“They were coming very regularly,too.”他們同樣非常有規律，與 A)項同意。B)were controlled by a clock.由時鐘控制，原文前面有一表示“似 乎的”連詞 if。C)，D)根據下文判斷都不正確。
22. 答案C。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衛星，B)a planet行星，D)當時未 知的智能生命。
23. 答案C。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。 見原文第四段，實際由“star”這個單詞就可排除B)，C)和D)選項。
25. 答案D。見原文第三段最后一句“About a hundred other pulsars have now been found...”因此D)項正確，其他各項均與原文意思不符。
英語四級閱讀練習題2：
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.
英語四級閱讀練習題答案解析：
31. 答案B。見原文第一段最后一句，“Because of modern technology like the satellite that travel around the world,information travels fast.”因此B)為正確選項。
32. 答案A。見原文第一段“News of a disaster such as an earthquake or a flood can bring help from distant countries within hours,help is on the way”因此A快速通信為正確答案。C)最近，最新新聞并不全面。B)現代技術，D)新觀念。
33. 答案A。見原文第二段“ ...To many people,the world has become smaller...”對許多人來說，地球變得更小了。這當然不是地球本身變小了，而是因為通信交流加快。因此A)為正確的闡述。
34. 答案D。見原文第二段“ ...Two hundred years ago,communication between the continents took a long time.All news was carried on ships that...”二百年前，大陸之間的信息傳遞耗時很長。所有的消息都是通過海上傳遞的…。D)by sea符合該意，因此為正確答案。
35. 答案C。見原文第二段“Peace was made in England,but the news of peace took six weeks to reach America...”和平協議在英格蘭簽署，但該消息直到六個星期以后才傳到美國。因此可以排除選項A)、B)和D)
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