问题补充：
My ipad looked just the same as Tom’s, but it costhis.
A. as much twice as
B. twice as much as
C. much as twice as
D. as twice much as
答案：
A. as much twice as
(答案→)B. twice as much as
C. much as twice as
D. as twice much as
解析： 句意：我的Ipad看起来和汤姆的一样，但是价格是他的两倍。这里使用倍数的表达“倍数+as+adj+as”的结构，所以选B。
