摘要:) 数量;金额;价格 His work now commands huge figures. 他的作品现在值大价钱.

网址:http://m.1010jiajiao.com/timu_id_4032705[举报]

Honeybees are disappearing for unknown reasons around the United States.Last winter, bees disappeared from 23 percent of American beekeeping businesses.Causes of the phenomenon, however, have remained a mystery.

       Now, scientists from several universities and the United States Department of Agriculture say they have a possible explanation for the bee decline(数量下降).It is a little known virus called Israeli acute--paralysis virus (IAPV) .The virus kills bees.Researchers in Israel first described it in 2004 , but until now, bee experts hadn’t paid much attention to it.

       When trying to find out why the bees were disappearing, a research team at Columbia University studied bee colonies ( 群体), some with and the others without decline.The research turned up large numbers of two types of fungi (真菌) once suspected of causing the bee decline.The research results, however, showed that the fungi were almost as common in colonies without a decline as they were in colonies with a decline.The researchers concluded that the two fungi probably weren’t the cause.

       Studies of the presence of IAPV, however, showed more interesting information.In those studies, done by a team at Pennsylvania State University in University Park, the virus showed up in 83 percent of samples from colonies with symptoms (症状).Only five percent of samples from symptomless colonies had it.

       Scientists still don’t know whether IAPIV can single--handedly cause the bee decline.They believe that even if the virus is making colonies sick , it could have a partner in crimeIt’s possible, for instance, that insects or chemicals in the environment weaken bees, making them more likely to catch IAPV.

       Scientists are still trying to figure out how IAPV came to the United States.The United States currently allows bee products to be imported from Canada, Australia, and New Zealand.If it turns out that this trade is spreading disease, the rules might eventually change.

According to the passage ,IAPV is a virus that ______.

       A.hasn’t attracted much attention

       B.well-known to doctors and scientist

       C.was first found by Austrian researchers

       D.is dangerous to animals and human beings

The underlined sentence in the fifth paragraph probably means______.

       A.the virus could also cause other damages

       B.there must be something that is the real cause

       C.IAPV is not the only cause for the bee decline

       D.the virus may be caused by the polluted environment

From the third and fourth paragraphs, we know researchers draw their conclusions by means of _______.

       A.calculating      B.comparing      C.examining           D.investigating

What still remains unknown to American scientists according to the passage?

       A.How and why to kill IAPV.

       B.How IAPV came to America.

       C.Whether bee products should be imported.

       D.How to change the rules of the bee products trade.

The best title for this passage would be _____.

       A.Bee Disease         B.How to Kill IAPV

       C.A Virus—IAPV     D.Two Types of Fungi

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III. Cloze test 完形填空 1’ * 20 = 20’

阅读下面短文,掌握其大意,然后从26-45各题所给的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。

People from Great Britain brought the English language to North America in the 16th and 17th centuries. And in the  36  300 years, there were  37  many changes in  38  places that now people can  39  tell an English person  40  an American in the way he or she talks.

Many old words  41  in England but were kept in America. For example, 300 years ago people in Great Britain got their water from something they called either a

“faucet”, a “spigot”, or a “tap”. All these words are  42  heard in different parts of America, but only “tap” is still common in  43 . Americans often made up new words or changed old  44 . “Corn” is one kind of plant in America and  45  in England.

Also, over the last three centuries the English language  46  thousands of new words for things that weren’t known  47 . And often, American and English people used two  48  names for them. A tin can (洋铁罐头) is called “tin” for short in England, but a “can” in America. The word “radio” is  49  all over the world, including America. But many English people call it a “wireless”. And almost anything having something to do  50  cars, railroads, etc.  51  different names in British and American English.

But now American and British English may be growing closer together. One  52  is the large amount (数量) of American speech that British people hear daily in movies, on television, or  53  travelers.  54  this, Americans seem to be influencing (影响) the British more and more. So some day, English may even be  55  on both sides of the Atlantic (大西洋).  

36.A. following     B. recent       C. oldest        D. last

37.A. such              B. too                C. so                 D. great

38.A. either            B. both               C. neither          D. two

39.A. hardly            B. difficulty        C. clearly          D. easily

40.A. with              B. from                C. to               D. and

41.A. disappeared   B. were disappeared   C. spoke   D. were spoken

42.A. not                B. hardly              C. yet             D. still

43.A. America         B. the two countries   C. England     D. British

44.A. word              B. forms              C. ones             D. ways

45.A. another           B. also planted     C. a plant        D. a kind of food

46.A. added          B. has added            C. discovered     D. has discovered

47.A. anywhere    B. in some countries  C. before     D. for centuries

48.A. new              B. short                 C. different      D. surprising

49.A. produced       B. made                 C. developed      D. used

50.A. to                B. away                 C. with             D. from

51.A. has              B. have                 C. has given       D. was given

52.A. thing           B. cause                C. reason           D. expression

53.A. from            B. through             C. on                D. by

54.A. For              B. Because             C. Besides         D. Because of

55.A. different         B. more different   C. the same         D. more useful

 

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