Turn off the switch ________ anything goes wrong with the machine．

试卷相关题目

• 1________ your next high-adventure trip is scheduled, start preparing now．

  A.In case

  B.Unless

  C.Only if

  D.Whenever

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• 2It is five years ________ we joined the army．

  A.before

  B.that

  C.when

  D.since

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• 3Come over and Have a chat with me whenever ________．

  A.you will be convenient

  B.it will be convenient to you

  C.you are convenient

  D.it is convenient to you

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• 4Was it 8 o'clock ________ you heard someone ________ at the door?

  A.when; knocking

  B.when; knock

  C.that; knocking

  D.that; knock

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• 5We had lived in Guangzhou for eight years ________ my father decided to move to Shanghai for his new job．

  A.before

  B.when

  C.as

  D.since

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• 6As we have planned, we'll go to Linyi to attend a meeting tomorrow．We'll buy some books as well ________ we get there．

  A.if

  B.when

  C.once

  D.while

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• 7She was such a stubborn person that she would die ________ she would admit she was wrong．

  A.when

  B.until

  C.after

  D.before

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• 8I'll inform you as soon as ________．

  A.I get the result

  B.I will get the result

  C.I got the result

  D.I'm going to get the result

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• 9The book was published ________ it was written．

  A.soon before

  B.long before

  C.before long

  D.soon after

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• 10I was leaving ________ several girls came up to me．

  A.while

  B.when

  C.as

  D.since

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