第二节:完形填空(共20小题;每小题1.5分,满分30分)

   Have you ever dreamed about a trip to space? 36 of some vegetables and crops are a lot 37 than you, as they have traveled to space and 38.

    China is among the three countries in the world that 39 agricultural research in space. 40 are Russia and the US. 41 1987, China has sent about 1,000 species of 42 into space. These include green peppers, tomatoes, cucumbers, carrots, lettuce and wheat. Even on China’s first manned spacecraft Shenzhou-V, there were some seeds from Taiwan.

    “43 in outer space such as radiation and low a gravity(重力) can cause big changes in the seeds,” said Chinese researcher JinXing.

    But not all seeds are better 44 going to space. After returning to 45 the best seeds are selected. These seeds produce much more and also grow 46 than normal seeds.

    As the 47 of genetically modified(转基因的) food is still being debated, some people 48 the safety of these “space vegetables” because some of their genes are changed during the trip to space.

 But Jin 49 a more positive view. He said, “unlike genetically modified crops, no new genes are 50 to the space vegetables, so they are certainly 51.

    China has also been cooperating with NASA to grow some super 52 potatoes on the International Space Station. Special growth rooms use computers to 53 the light, temperature and humidity(湿度).54 this technology a new, virus-free potato can be produced every 40 to 50 days instead of the previous 55 crop.

36.A.Seeds          B.Roots          C.Leaves           D.Stems(茎)

37.A.happier        B.thinner         C.luckier           D.taller

38.A.out           B.back           C.down            D.up

39.A.carry out       B.turn out        C.make out          D.take out

40.A.Another        B.The other       C.The others        D.Others

41.A.In            B.Since          C.From            D.To

42.A.crops          B.genes          C.seeds            D.vegetables

43.A.Conditions      B.Situations       C.The air            D.Temperatures

44.A.before         B.after          C.since            D.for

45.A.Earth          B.Space          C.Air             D.Sun

46.A.slower         B.sooner         C.smaller            D.faster

47.A.price          B.safety          C.cost             D.possibility

48.A.doubt          B.worry         C.believe            D.wonder

49.A.hands          B.holds          C.takes            D.catches

50.A.brought        B.taken          C.introduced         D.added

51.A.delicious       B.sweet          C.nice             D.safe

52.A.size           B.length         C.color            D.shape

53.A.take           B.control         C.give            D.make

54.A.Using         B.Judging        C.Developing       D.Considering

55.A.monthly        B.daily          C.yearly           D.weekly

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