Whoever leaves the room last must make sure ________ all the windows are shut．

试卷相关题目

• 1Study hard, ________ you will make great progress．

  A.and

  B.or

  C.or else

  D.otherwise

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• 2________ one hour in the morning, and you will be looking for it the rest of the day．

  A.Lose

  B.Lost

  C.To lose

  D.Having lost

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• 3Try harder ________ you will win a ticket for the 2008 Olympic Games．

  A.but

  B.and

  C.or

  D.so

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• 4They'd traveled around the world，________ they had little travel experience of their own country．

  A.and

  B.for

  C.but

  D.or

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• 5He is not a perfect person．________， I like him．

  A.However

  B.Instead

  C.Besides

  D.But

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• 6I didn't make great progress in my English study _________ my teacher had given me some advice on how to learn the language well．

  A.unless

  B.before

  C.until

  D.when

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• 7He has difficulty with his English; ________, he works hard and is making rapid progress．

  A.and

  B.but

  C.however

  D.yet

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• 8The secretary had to stay in her office all day ________ her boss might have something important to be typed．

  A.in case

  B.so that

  C.until

  D.when

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• 9Stop making so much noise _________ the neighbors will start complaining．

  A.or

  B.and

  C.so

  D.yet

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• 10Watch your step, ________ you might fall into the water．

  A.or

  B.and

  C.unless

  D.but

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