At times the balance in nature is ________, resulting in a number of possibly unforeseen effects.

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• 1You'd better give up smoking, Tom, for many diseases are ________ to smoking, you know.

  A.linked

  B.led

  C.exposed

  D.blamed

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• 2She always ________ the smell of fresh bread with her grandmother, who loved baking.

  A.associated

  B.remembered

  C.acknowledged

  D.attributed

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• 3David ________ from the analysis of the traffic accident that it had been caused by human error.

  A.announced

  B.acknowledged

  C.concluded

  D.considered

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• 4The lady ________ the boy with two dollars for bringing back her lost dog.

  A.rewarded

  B.paid

  C.offered

  D.presented

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• 5Rio de Janeiro of Brazil ________ the bid to hold the 2016 Summer Olympic Games after beatingrivals Chicago, Tokyo and Madried.

  A.won

  B.hosted

  C.solved

  D.earned

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• 6—When will they arrive?—I ________ they will arrive in 10 minutes. Let's wait here.

  A.talk

  B.ensure

  C.predict

  D.want

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• 7I'm glad that my parents have ________ of my buying a new car.

  A.agreed

  B.promised

  C.allowed

  D.approved

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• 8— Why was the Great Wall built?— To ________ against enemies.

  A.turn

  B.defend

  C.protect

  D.prevent

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• 9I ________it to my teacher to take a better paid post if I can get one.

  A.owe

  B.belong

  C.give

  D.donate

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• 10When they moved to Canada, the children____ to the change very well.

  A.adopted

  B.adapted

  C.suited

  D.accustomed

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