First published in 1927, the charts remain an ________ source for researchers.

试卷相关题目

• 1His business was very successful, but it was at the ________ of his family life.

  A.consumption

  B.credit

  C.exhaustion

  D.expense

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• 2The board of the company has decided to ________ its operations to include all aspects of the clothing business.

  A.multiply

  B.lengthen

  C.expand

  D.stretch

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• 3________ that he wasn’t happy with the arrangements, I tried to book a different hotel.

  A.Perceiving

  B.Penetrating

  C.Puzzling

  D.Preserving

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• 4It was the first time that such a ________ had to be taken at a British nuclear power station.

  A.presentation

  B.precaution

  C.preparation

  D.prediction

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• 5This is not an economical way to get more water; ________, it is very expensive.

  A.on the other hand

  B.on the contrary

  C.in short

  D.or else

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• 6Joe is not good at sports, but when it ________ mathematics, he is the ‘best in the class.

  A.comes to

  B.comes up to

  C.comes on to

  D.comes around to

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• 7Doctors warned against chewing tobacco as a ________ for smoking.

  A.relief

  B.revival

  C.substitute

  D.succession

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• 8When carbon is added to iron in proper ________ the result is steel.

  A.rates

  B.thicknesses

  C.proportions

  D.densities

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• 9You should try to ________ your ambition and be more realistic.

  A.reserve

  B.restrain

  C.retain

  D.replace

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• 10Nancy is only a sort of ________ of her husband’s opinion and has no ideas of her own.

  A.sample

  B.reproduction

  C.shadow

  D.echo

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