（2007上海）Small sailboats can easily turn over in the water______they are not managed carefully.

试卷相关题目

• 1（2008福建）Nancy enjoyed herself so much ______ she visited her friends in Sydney last year.

  A.that

  B.which

  C.when

  D.where

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• 2（2008安徽）______in the fields on a March afternoon, he could feel the warmth of spring.

  A.To walk

  B.Walking

  C.Walked

  D.Having walked

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• 3（2008天津）We’ll have a picnic in the park this Sunday ______ it rains or it’s very cold.

  A.since

  B.if

  C.unless

  D.until

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• 4（2007天津）It is difficult for us to learn a lesson in life______we’ve actually had that lesson.

  A.until

  B.after

  C.since

  D.when

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• 5（2007安徽）The field research will take Joan and Paul about five months; it will be a long time ______we meet them again.

  A.after

  B.before

  C.since

  D.when

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• 6（2007江西）He was told that it would be at least three more months______he could recover and return to work.

  A.when

  B.before

  C.since

  D.that

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• 7（2007辽宁）We had to wait half an hour______we had already booked a table.

  A.since

  B.although

  C.until

  D.before

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• 8（2007湖南）Most brids find it safe to sleep in the trees, but ______  they have eggs or young chicks, they don’t use a nest.

  A.why

  B.how 

  C.unless

  D.where

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