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Influenza

Influenza has been with us a long time.According to some Greek writers 51 medical history,the outbreak of 412 B.C.was of influenza.The same has been suggested of the sickness 52 swept through the Greek army attacking Syracuse in 395 B.C.Flu is a disease that moves most quickly among people living in 53 conditions,hence,it is likely to attack armies.

54 the nineteenth century there were five widespread outbreaks of influenza.The last of the five 55 in 1889 and marked the beginning of the story of influenza in our time.56 the recent outbreak,it started in Asia.

For more than forty years before that outbreak,influenza had steadily __57__and was believed to be dying out.A.new group of outbreaks was 58 by the great outbreak of 1889-1890 and for the next quarter of a century influenza remains a constant threat.

In April 918 flu broke among American troops stationed in France.It quickly spread through all the ___59 but caused relatively few deaths.Four months later,however,a second outbreak started which _60___ to be a killer.It killed not only the old and already sick but also healthy young adults.It ___61 through every country in the world,only a few distant islands in the South Atlantic and the Pacific remaining __62__.It brought the life of whole countries to stop,food 63 stopped and work loss was very great.Before the great outbreak ended,it had killed ___64 15 million people.Thereafter there have been several great outbreaks throughout the world.It is thus __65__that influenza is a terrible infection that we have to pay more attention to.

51.A.by B.on C.to D.with

52.A.where B.that C.why D.who

53.A.local B.good C.crowded D.rich

54.A.Since B.During C.Among D.For

55.A.changed B.happened C.Among D.For

56.A.Like B.As C.Along D.Before

57.A.increased B.interrupted C.decreased D.kept

58.A.introduced B.controlled C.prevented D.reported

59.A.armies B.villagers C.farmers D.enemies

60.A.ceased B.wanted C.proved D.failed

61.A.got B.put C.went D.looked

62.A.uncounted B.unused C.untouched D.unchanged

63.A.sources B.shortages C.purchases D.supplies

64.A.last B.most C.all D.least

65.A.clear B.strange C.impossible D.wise

参考答案：BBCBB.ACAAC.CCDDA