I had been looking for the book for two days ______

I had been looking for the book for two days _______ I found it at last.

#30963

until

when

while

before

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7．Peter was so excited            he received an invitation from his friend to visit Chongqing.

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where

that

why

when

—Can you work out the problem?   —I can’t ______your explain how to do it.

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but for

except

apart from

unless

  __________ I got home, the clock struck 12.

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When

While

During

(2013·厦门第一次质量检查)You had better book rooms at the hotel in advance ________ you should find no room on your arrival.

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so that

even if

in case

now that

 Reality is not the way you wish things to be, nor the way they appear to be, _________ the way they actually are.

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but

and

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