16、 Bread and butter _____ for breakfast in many Chinese homes nowadays but things were different 20 years ago.  

A. serve                       B. is served                   C. has served                D. are served  

16、B

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 Bread and butter _____ for breakfast in many Chinese homes nowadays but things were different 20 years ago.  

A. serve                       B. is served                   C. has served                D. are served  

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