问题标题：
【AnewiPhonecostsabout_______ofasecond-handone．（）A.thepriceofthreetimesB.threetimesthepriceC.asmuchasthethreetimespriceD.threetimesmorethantheprice】
问题描述：
A new iPhone costs about _______ of a second-hand one．（）
A.the price of three times
B.three times the price
C.as much as the three times price
D.three times more than the price
蒋瑞青回答：
答案：B考查倍数被动法．倍数表达有四种：1．"A+倍数+形容词或副词的比较级+than+B"，2．"A+倍数+as+形容词或副词的原级+as+B"，3．"A+倍数+thesize/height/length/width，etc+of+B"，4．{...
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