It never _____  humans until the mid1990s that some animals can be cloned.

试卷相关题目

• 1He often takes this road to avoid ______ the troublesome boy.

  A.to meet

  B.meeting

  C.to meeting

  D.to have met

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• 2My point is that you must do ____________ is best for you.

  A.whatever

  B.however

  C.no matter what

  D.no matter how

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• 3We Chinese eat with chopsticks ______ most westerners eat with knives and forks.

  A.for

  B.as

  C.while

  D.when

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• 4Is this school ______ you used to study?

  A.where

  B.at which

  C.the one

  D.that

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• 5______ nice and delicious, the fried chicken was soon sold out.

  A.Tasted

  B.Being tasted

  C.Tasting

  D.To taste

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• 6Our efforts resulted________failure.I think I'm also responsible________it.

  A.in；to

  B.from；to

  C.in；for

  D.from；for

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• 7--- Do you know the West Lake in Hangzhou? --- Yes, this is the third time that I ______ this beautiful city.

  A.visit

  B.visited

  C.have visited

  D.had visited

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• 8After suffering a heart attack, Michael Jackson was pronounced dead, _______ a tragic end to the world's most popular entertainer.

  A.having marked

  B.to mark

  C.marked

  D.marking

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• 9Both the summer and the winter Olympic Games are held every four years on a _______ basis.

  A.magical

  B.regular

  C.familiar

  D.logical

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• 10—Why did he say so? —Sorry, I don't understand ________ he has said means.

  A.all what

  B.what all

  C.all that

  D.that all

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