.________ gas leaks and similar accidents should occur, some responsible persons should regularly inspect all the laboratories.

试卷相关题目

• 1-- I'd like to invite you to a party tomorrow evening. -- Thank you, but ______ I'll be free I'm uncertain.

  A.while

  B.if

  C.when

  D.whether

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• 2No matter ______ says no to us , we will return to our motherland.

  A.whoever

  B.who

  C.what

  D.whatever

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• 3Many people in the city wonder _____the city officials have the information they need to solve the problem.

  A.that

  B.whether

  C.what

  D.which

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• 4 Clearly, in a system ______ every decision is made on the basis of tradition alone, it may be difficult to achieve progress.

  A.that

  B.when

  C.where

  D.which

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• 5Work hard _____ you can succeed.

  A.in order to

  B.so that

  C.for fear that

  D.in case

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• 6. Linda was walking in the street ________ she noticed a thief stealing from a old lady.

  A.while

  B.when

  C.as

  D.which

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• 7_____everybody is here, Let's begin our meeting.

  A.Now that

  B.Because

  C.For

  D.When

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• 8It is about ten years _____ I met you last.

  A.since

  B.for

  C.when

  D.as

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• 9I'll start early , _______ it is dark or light .

  A.however

  B.whether

  C.if

  D.though

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• 10_______I know , the computer can never take the place of the human brain.

  A.As for

  B.As long as

  C.So far for

  D.So /As far as

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