With some technical problems to be solved, it may be a while _____ the system is put into use.

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• 1The A(H1N1) flu virus will infect a third of the world's Population ________ it continues to spread at this rate, some scientists warned.

  A.when

  B.if

  C.though

  D.as

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• 2— Our holiday cost a lot of money.— Did it? Well, that doesn't matter ______ you enjoyed yourselves.

  A.even if

  B.in case

  C.as far as

  D.as long as

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• 3— Why hasn't Jane spoken to me for days? — It was ____ you spoke about her behind her back.

  A.as

  B.since

  C.for

  D.because

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• 4Jenny was very sad over the loss of the photos she had shot at Canada, ____ this was a memory she especially treasured.

  A.as

  B.if

  C.when

  D.where

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• 5It was some time ______ we realized the truth.

  A.when

  B.until

  C.since

  D.before

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• 6— What are you planning to do in the future? — No ide

  A.After all, I still have three terms to go _____I graduate. A.before

  B.when

  C.if

  D.since

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• 7He is difficult to make friends with, but the friendship of his, ____, is more true than any other's.

  A.once gained

  B.when to gain

  C.after gained

  D.while gaining

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• 8Tourist excitement has built up _______ new places of interest were opened two years ago.

  A.as

  B.since

  C.only if

  D.even though

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• 9Many of them turned a deaf ear to his advice, ______ they knew it to be valuable.

  A.as if

  B.now that

  C.even though

  D.so that

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• 10We won't give up _____we should fail 100 times .

  A.even if

  B.since

  C.whether

  D.until

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