______ some teenagers don't realize is _______ difficult life can be after they get addicted to drugs．

试卷相关题目

• 1In hot weather, an old tyre can break again easily _____it's mended．

  A.when

  B.where

  C.which

  D.that

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• 2He will spend six hours at his desk _______ he finishes his composition.

  A.before

  B.until

  C.after

  D.when

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• 3People all over the country felt shocked _______ they heard of the news ______eight children were killed at the school gate .  

  A.the moment , that

  B.when , which

  C.immediately , /

  D.the second , what

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• 4You see the lightning _____ it happens, but you hear the thunder later.

  A.the instant

  B.for an instant

  C.on the instant

  D.in an instant

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• 5How can they expect to learn anything________they never listen?

  A.when

  B.until

  C.unless

  D.Though

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• 6It was difficult for her to make an immediate decision as it would affect her present job and her relationship with the manager ________.

  A.either

  B.though

  C.meanwhile

  D.as well

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• 7There was no doubt ____ it was in the supermarket _____ I lost my wallet yesterday.

  A.whether, whether

  B.that, that

  C.that, whether

  D.whether, that

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• 8______life began on the earth is one of the biggest puzzles to scientists.

  A.How

  B.What

  C.Where

  D.That

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• 9I decided to write about Chaplin, one of ______ films I had seen several years before.

  A.whose

  B.whom

  C.that

  D.which

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• 10______practice makes perfect is true.

  A.What;

  B.That

  C.Which

  D.If

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