The argument remains extremely heated ______ there are necessary conditions of existence such as water on the Mars .    

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• 1I am sure we can help you solve the problem, ________ you tell us all the necessary information.

  A.in case

  B.now that

  C.provided that

  D.in order that

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• 2— Did the door keeper let you in?  — No, _______ I tried to tell him that I was your aunt, he just wouldn't listen to me.

  A.No matter

  B.Even if

  C.However

  D.Whatever

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• 3Please call my  secretary to arrange a meeting this  afternoon, or ____ it is convenient  to you.       

  A.whenever

  B.however

  C.whichever

  D.wherever

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• 4____ you've got a chance, you might as well make full use of it.     

  A.Now that

  B.That

  C.Although

  D.Even if

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• 5They are talking about Rome____they had been there  before.    

  A.even if

  B.if

  C.as though

  D.as

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• 6Early in his life, he learned to treasure the work of other people ________ he helped his father do the farming.

  A.where

  B.what

  C.when

  D.whom

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• 7I have kept that photo_______I can see it every day, as it always reminds me of my universitylife in London.         

  A.when

  B.where

  C.how

  D.whether

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• 8Although he knew little about the large amount of work done in the field , he succeeded _____  other more well-informed experimenters failed .

  A.which

  B.that

  C.what

  D.where

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• 9 _____ I admit that there are problems, I don't agree that they can't be solved.

  A.If

  B.As

  C.While

  D.Since

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• 10According to the rules of our school, you may leave the classroom ____ you have the teacher's permission.

  A.unless

  B.on condition that

  C.though

  D.until

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