There is no ____ that 100 years ago animal testing was cruel, but today animals in experiments are very well taken care of.

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• 1Good news! The price of all those second-hand goods is ________ before.

  A.30% as lower as

  B.30% lower than

  C.lower 30% than

  D.as 30% low as

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• 2The war made ______ impossible for the scientist to go on with his research.

  A.him

  B.it

  C.this

  D.that

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• 3There was no doubt ____ it was in the supermarket _____ I lost my wallet yesterday.

  A.that, that

  B.whether, whether

  C.that, whether

  D.whether, that

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• 4No matter how bright a talker you are, there are times when it's better ______ silent.

  A.remain

  B.be remaining

  C.to remain

  D.having remained

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• 5-You look upset. -Yes, this is the first time I ________ form home.

  A.leave

  B.left

  C.have been away

  D.is away

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• 6There is no doubt _____ we will succeed if we try our best.

  A.which

  B.what

  C.whether

  D.that

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• 7-- Tommy, your mum has been out without glasses! -- Well, take it easy. ________ she is back home for them.

  A.It is long before that

  B.It won't be long since

  C.It won't be long before

  D.It will be long before

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• 8The more one is _______ the English-speaking environment, the better he or she will learn the language.

  A.exposed to

  B.filled in

  C.caught on

  D.kept up

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• 9______ Marx's works with Engels', and you'll find many differences．

  A.Comparing

  B.Compare

  C.To compare

  D.If you compare

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• 10----Is this the first time you _____Chengdu ? ----No. But the first time I _____here, the city wasn't so beautiful.

  A.visited, came

  B.visited, have come

  C.have visited, have come

  D.have visited, came

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