19.The age of the students ranged from 17 to 21 with a/an of 19. A.average B.usual C.normal D.regular 查看更多

 

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The age of the students ranged from 17 to 21 with a/an ________ of 19.

A.average           B.usual               C.normal                    D.regular

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The age of the students ranged from 17 to 21 with a/an _________ of 19.

A. average            B. usual               C. normal             D. regular

   

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