.Most birds find it safe to sleep in the trees, but __________ they have eggs or young chicks, they don't use a nest.

试卷相关题目

• 1.—Did you return Fred's call? —I didn't need to _________ I'll see him tomorrow.

  A.though

  B.unless

  C.when

  D.because

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• 2The book was written in 1946, __________ the education system has witnessed great charges.

  A.when

  B.during which

  C.since then

  D.since when

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• 3Look out! Don't get too close to the house __________ roof is under repair.

  A.whose

  B.which

  C.of which

  D.what

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• 4Last week, only two people came to look at the house, __________ wanted to buy it.

  A.none of them

  B.both of them

  C.none of whom

  D.neither of whom

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• 5We shouldn't spent our money testing so many people, most of __________ are healthy.

  A.that

  B.which

  C.what

  D.whom

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• 6With his work completed,the business man stepped back to his seat,feeling pleased ________ he was a man of action.

  A.which

  B.that

  C.what

  D.whether

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• 7He expressed a hope _______ he would visit China again the next year, and this was the very hope _______ he would express as soon as he arrived in the country.

  A.that; that

  B.which; which

  C.that; which

  D.which; that

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• 8—What's that building? — ________ the medical equipment is stored.

  A.There's in which

  B.That's where

  C.The building that

  D.That's the building which

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• 9A modern city has been set up in _______ was a wasteland ten years ago.

  A.what

  B.which

  C.that

  D.where

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• 10Recently I bought an ancient Chinese vase, _______ was very reasonable.

  A.which price

  B.the price of which

  C.its price

  D.the price of whose

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