Which of the following best states the main idea of the selection、

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• 1Arland Williams died because he ______.

  A.had suffered head injuries in the crash

  B.had been in the icy water too long

  C.did not know how to swim

  D.wanted to become a hero

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• 2The rescue was made more difficult because there ______.

  A.weren’t enough rescue workers

  B.were no rescue boats available

  C.was only enough room for one rescue helicopter

  D.was hardly any room for a rescue helicopter

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• 3Flight 90 crashed into the Potomac River _____.

  A.as it was landing

  B.as it was flying

  C.5 minutes after takeoff

  D.as it was taking off

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• 4What delayed Air Florida Flight 90 from taking off earlier、

  A.The runways had to be cleared of snow.

  B.The plane had to be refueled.

  C.The plane needed some engine repair.

  D.C.The plane needed some engine repair.D.The wings of the plane had to be cleared of ic

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• 5What’s the tone of this essay、

  A.Humorous.

  B.Ironi

  C.C.Pessimistic.

  D.Positiv

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