完形填空(共20小题;每小题1.5分,满分30分)

    阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填人空白处的最佳选项,并在答题卡上将该项涂黑

One summer in college, I was invited to be an instructor at a high school leadership camp.

I first   36   a boy under the tree on the first day of camp. His obvious   37   and shyness made him appear weak and lonely. Nearby, 200   38   campers were playing and joking, but the boy seemed to want to be anywhere   39   where he was.

I was instructed to care more about campers who might feel   40  . So I   41   him and said, “Hi, I’m Kevin. It’s nice to meet you. How are you?”

  42   a shaky voice he   43   answered, “Okay, I guess.”

I calmly asked him to join in the activities and   44   some new people. He quietly replied, “No, this is not really my thing.”

I could   45   that this whole experience was   46   to him. But I somehow knew it wouldn’t be right to   47   him, either. It was going to take more time and   48  .

The next day, I was leading camp songs for the campers. They eagerly participated. But the boy was just sitting alone,   49   out the window.

That evening at our nightly staff meeting, I made my   50  about him known. I asked them to pay special attention and spend time with him   51   they could.

The days flew by fast. When the “last dance” came, surprisingly, the boy from under the tree was now a shirtless dancing   52  . He owned the dance floor   53   meaningful time with others. I couldn’t’ believe it was him.

In that instant, I realized how easy it is to give a bit of   54  every day. You may never know how much each gesture may mean to someone else. I tell this story as   55   as I can, and I advise others to look out for their own “boy under the tree.”

36.A.learned      B.recognized         C.noticed       D.heard

37.A.anger          B.discomfort          C.excitement         D.satisfaction

38.A.ambitious  B.curious       C.anxious      D.eager

39.A.other than B.just as        C.or rather    D.as well as

40.A.left out       B.put out       C.made out   D.let out

41.A.passed      B.left     C.visited        D.approached

42.A.At       B.In        C.On      D.By

43.A.unfortunately    B.unwillingly C.unconsciously    D.uninterestingly

44.A.help   B.interview   C.find    D.meet

45.A.sense          B.suggest      C.consider     D.prove

46.A.familiar      B.similar        C.strange      D.typical

47.A.push  B.pull     C.pardon       D.punish

48.A.effects        B.exercises   C.efforts        D.expenses

49.A.observing  B.examining C.admiring    D.staring

50.A.trouble       B.concern      C.devotion    D.understanding

51.A.unless         B.before        C.when D.since

52.A.wonder      B.danger       C.scene          D.instructor

53.A.sparing       B.saving         C.spreading  D.sharing

54.A.himself       B.yourself      C.themselves        D.itself

55.A.soon  B.far      C.often D.long

London: What could possibly he wrong with planting trees? The benefits are obvious: they firm the soil, absorb extra water and take carbon dioxide out of the atmosphere.

However, it now turns out that planting trees could add to global warming. Tree roots do a great job of keeping soil firmly on the ground and out of the wind's power. The problem is that some of those dust clouds play an important part in taking in carbon dioxide.

Huge dust storms blow out over the oceans from dry parts of North Africa and central Asia. Tons of dust are lifted and left as a thin film over the ocean surface.

Dust from China is carried east and left in the Pacific Ocean. If a tree-planting program there is successful and the dust supply reduced, the final result may be that less carbon dioxide gets locked away in the ocean.

Andy Ridgwell, an environmental scientist from the University of East Anglia, has spent the past few years studying dust and says his work shows clearly the complexity of the system and the importance of not working uselessly with it without understanding the results. For this reason the need is to focus on cutting carbon dioxide giving off rather than dealing with the land surface aimlessly.

An American scientist, Robert Jackson, has shown that when native grassland areas are occupied by trees, carbon is lost from the soil. "We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees. " said Jackson.

In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed by the loss of carbon from the soil below ground.

Countries that plan to combat global warming by planting trees may have to think again. Solutions to environmental problems are often more complex than they first appear, and understanding the Earth's climate is a very great challenge.

64. People usually hold the opinion that _______.

A. huge dust storms can destroy carbon dioxide

B. huge dust storms can destroy the oceans on the earth

C. planting trees could reduce global warming

D. planting trees is the only way to control huge dust storms

65. Andy Ridgwell, the environmental scientist, believes that _______.

A. environmental problems are more complex than expected

B. trees shouldn't have been planted in dry places

C. dust plays a more important part than trees

D. carbon dioxide is harmful to everything

66. Robert Jackson's experiment proves that _______.

A. carbon can turn grass into dust

B. trees hold more carbon than grass

C. less carbon can make trees grow faster

D. grassland areas should be covered by forests

67. The underlined word "combat" in the last paragraph means _______.

A. learn about        B. give up               C. live with           D. fight against

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