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In____review of 44 studies, American researchers found that men and women ____who ate six key foods daily cut the risk of ______ heart disease by 76%.  

A. a; the         B. the; a         C. a; 不填        D. 不填; a  

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__________ the silence for the pauses, we could hear each other’s breathing and could almost bear our own heartbeats.

A. In            B. For            C. Under            D. Between

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There are not enough seats for the guests. We need _____ chairs.

    A. three other             B. another three      

  C. more three             D. other three

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--- Where can we have supper tonight?

    --- Oh, if you don’t mind,we can do it at _____ of the restaurants.  

    A. all           B. every          C. any        D. each

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A man does not know the difficulty of anything_________ he does it personally.

although     B. if            C. because       D. Unless

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--Nancy is not coming tonight. --But she ___________ !

A. promises        B. promised   C. will promise     D. had promised

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—What’s the area and population of the US?

—The US is about the same size as China, but its population is five times ______.

A. smaller  B as little.  C. as few   D. bigger.

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—Why didn’t you tell him about the meeting?

—He rushed out of the room _____ I could say a word.

A. before            B. until                C. when           D. after

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—Must I turn off the gas after cooking?

—Of course. You can never be ____ careful with that.

A. enough                B. too                     C. so                      D. very

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What a table! I’ve never seen such a thing before .It is________  it is long.

A.half not as wide as                               B.wide not as half as

C.not half as wide as                               D.as wide as not half

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