There are many factors contributing to the explosion of being too fat in the United States and the world, ______ the fundamental changes in the composition of their diet are first among them.  

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• 1He supposed he'd be late for the film The King's Speech ______ he ended up getting there ahead of time.

  A.but

  B.or

  C.so

  D.for

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• 2Work hard________ you will succeed.    

  A.and

  B.so

  C.or

  D.or not

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• 3Bring the flowers into a warm room ________ they'll soon open．

  A.or

  B.and

  C.but

  D.for

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• 4______you _______I am going to help Tom.   

  A.Either;or

  B.Not;but

  C.Not only;and

  D.Each;and

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• 5— Can you tell me how to learn English well?   — Do more speaking, I think, ______ you will not be good at spoken English.   

  A.then

  B.and

  C.or

  D.until

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• 6Mary was on the point of leaving the room ___________the telephone rang.

  A.when

  B.while

  C.as

  D.but

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• 7—  I wonder how much you charge for your services．— The first two are free ____  the third costs $30．

  A.while

  B.until

  C.when

  D.before

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• 8Find ways to praise your children often，________you'll find they will open their hearts to you.

  A.till

  B.or

  C.and

  D.but

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• 9I want to buy the jacket,_______ I have not enough money with me.  

  A.but

  B.so

  C.or

  D.for

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• 10Turn the heat down ________ your cake will burn.

  A.and

  B.or

  C.so

  D.but

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