Some scientists believe that ________ is no doubt ________ a cure for AIDS will be found.

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• 1Karen was always thinking we were talking about his poor past. Every time we were chatting together, he would be all _____.

  A.over

  B.ears

  C.lone

  D.through

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• 2The lawyer rarely wears anything other than jeans and T-shirt ________ the reason.

  A.whatever

  B.wherever

  C.whenever

  D.however

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• 3Since time began, it seems, people have been putting off______they______have done today, scolding themselves in the meantime．

  A.that, must

  B.that, should

  C.what, could

  D.what, would

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• 4—Must I turn off the gas after cooking? —Of course, you can never be ________ careful with that．

  A.enough

  B.very

  C.so

  D.Too

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• 5The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent ________ cause a series of explosions of the nuclear reactors in several power stations.

  A.to

  B.that

  C.as to

  D.as that

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• 6We congratulated Jerry ________ the championship.

  A.on winning

  B.winning

  C.to win

  D.about winning

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• 7One learns a knowledge by making mistakes and ______ them.

  A.corrects

  B.correct

  C.to correct

  D.correcting

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• 8—The weather isn't good enough for an outing，is it? —Not at all. We can't have ________ at this time of the year.

  A.a worse day

  B.a nicer day

  C.such bad a day

  D.so fine a day

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• 9Leonardo da Vinci (1452-1519) ________ birds kept in cages in order to have the pleasure of setting them free.

  A.is said to be buying

  B.is said to have bought

  C.had said to buy

  D.has sad to have bought

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• 10______and I'll get the work finished.

  A.Have one more hour

  B.One more hour

  C.Given one more hour

  D.If I have one more hour

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