________ he is doing seems quite difficult．

试卷相关题目

• 1It's not necessary to explain the truth ____ there is spring wind, there is green grass.

  A.which wherever

  B.that which

  C.which when

  D.that wherever

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• 2____ gets well prepared will pass the exam easily.

  A.Who

  B.Anyone

  C.Whoever

  D.Those who

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• 3_____ is estimated is that 300 million farmers will become urban dwellers in three decades.

  A.It

  B.As

  C.That

  D.What

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• 4_______ made things worse, he said, was that his roommate never took part in any of the cleaning work．

  A.What

  B.Which

  C.That

  D.Who

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• 5It was true ________ the boy did surprised us．

  A.that what

  B.what that

  C.that

  D.what

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• 6It was ten o'clock ________ we got to the top of the hill．

  A.that

  B.when

  C.which

  D.since

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• 7Whatever you say, _________ he has composed is not a good work．

  A.what

  B.which

  C.that

  D.whom

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• 8Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.

  A.it; what

  B.what; what

  C.what; it

  D.it; it

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• 9_____ comes first will get the prize.

  A.Who

  B.Whoever

  C.Whom

  D.Whomever

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• 10________ is expected, according to the online survey, is that prices of houses will not go up any more．

  A.As

  B.It

  C.What

  D.Which

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