____ we have tried it, we can't imagine how hard it is.

试卷相关题目

• 1______ every year, many people do not hold a high opinion of the CCTV Spring Festival Gala, it has become a somewhat necessary part of the festival.   

  A.As

  B.Therefore

  C.While

  D.Since

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• 2The medicine works more effectively _________ you drink some hot water after  taking it .  

  A.as

  B.until

  C.althoughD.if

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• 3— What was the party like?— Wonderful. It's years ________ I enjoyed myself so much.

  A.after

  B.when

  C.before

  D.since

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• 4We must take measures to stop various kinds of pollution ______ the environment gets worse.

  A.unless

  B.until

  C.before

  D.when

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• 5Henry failed in the game, but he looked ______ nothing had happened.   

  A.even if

  B.as if

  C.such as

  D.ever since

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• 6_______you return those books to the library immediately, you will have to pay a fine.

  A.Until

  B.Unless

  C.If

  D.Provided

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• 7As is reported, it is 100 years ________ Tsinghua University was founded.

  A.when

  B.before

  C.after

  D.since

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• 8Many people believe we are heading for environment disaster _____ we basically change theway we live.   

  A.if

  B.but

  C.unless

  D.once

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• 9I persuaded my parents ________ we should go to Italy for a holiday rather than Scotland.

  A.what

  B.that

  C.where

  D.how

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• 10In ancient times, people rarely travelled long distances and most farmers only travelled ________the local market.

  A.longer than

  B.more than

  C.as much as

  D.as far as

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