The brain is capable of ignoring pain messages if（  ）to concentrate on other activities。

试卷相关题目

• 1In the past few years new machinery（  ）in the factory。

  A.has been introduced

  B.introduced

  C.was introduced

  D.has introduced

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• 2Two men burst into the office and tried to grab the money just as it（  ）。

  A.wascounted

  B.wasbeingcounted

  C.hadbeencounted

  D.hasbeencounted

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• 3Great changes（  ）and this city could hardly（  ）。

  A.hadtakenplace, berecognized

  B.havebeentakenplace, havebeenrecognized

  C.havetakenplace,recognize

  D.havetaken,berecognized

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• 4Have you moved into the new house? Not yet.The rooms（  ）。

  A.arebeing painted

  B.arepainted

  C.are painting

  D.are been painting

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• 5The police found the house（  ）and a lot of things（  ）。

  A.has broken into, had been stolen

  B.had broken into, had been stolen

  C.was broken into,was stolen

  D.had been broken into,stolen

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• 6he（  ）a car and（  ）to the hospital immediately。

  A.hadbeenknockeddown, wouldsend

  B.wasknockeddown, beingsent

  C.hadknockeddown, wassent

  D.hasknockeddown, wassent

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• 7They（  ）into two groups and（  ）to finish the work before Friday。

  A.aredivided, areordered

  B.weredivided,ordered

  C.hadbeendivided, ordering

  D.hasdivided,hasordered

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• 8Greater efforts to increase wheat production（  ）if bread Mintage is to be avoided。

  A.must make

  B.must be made

  C.had to make

  D.had made

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• 9The three tows at the .front（  ）for our guested。

  A.hasbeenreserved

  B.is beenreserving

  C.arereserved

  D.arebeing reserved

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• 10Many difficulties（  ）by the climbers before the rescue team came。

  A.have overcome

  B.had been overcame

  C.had overcome

  D.had been overcome

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