Evidence obtained from observation and experiment is often used to ________ a scientific theory．

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• 1This term I have improved my English, I ________ this to the good teaching methods of my English teacher．

  A.thanked

  B.owed

  C.owned

  D.explained

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• 2To ________ is to save and protect, to leave what we ourselves enjoy such good condition that others may also share the enjoyment．

  A.preserve

  B.conceive

  C.convert

  D.contrive

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• 3In such cases, a newspaper reporter is sent to ________ the people present, trying to find out details of the accident．

  A.interview

  B.cover

  C.greet

  D.require

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• 4John was tired and stretched on his bed．I________ down next to him．

  A.lied

  B.lay

  C.laid

  D.were lying

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• 5They have been _________ by injury, but nothing could _________ their determination to continue．

  A.weak; weaken

  B.weakness; weakened

  C.weakened;weaken

  D.weaken; weaken

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• 6They ________ 20 miles to reach the capital．

  A.walked

  B.ran

  C.marched

  D.covered with

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• 7The school has only been open for six months, so it's hard to ________ its success．

  A.weigh

  B.measure

  C.evaluate

  D.estimate

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• 8A troop of carefully selected soldiers set out in search of those who might ________ the terrible coal mine accident．

  A.live

  B.rescue

  C.exist

  D.survive

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• 9The policeman ________ him by forcing him to follow Jim into the house．

  A.kept

  B.locked

  C.prisoned

  D.trapped

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• 10Local residents have ________ angrily to the news．

  A.answered

  B.reacted

  C.refused

  D.objected

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