问题补充：
This computer is .
A. twice as expensive as that one
B. twice expensive than that one
C. as twice expensive as that one
D. two times as expensive as that one
答案：
(答案→)A. twice as expensive as that one
B. twice expensive than that one
C. as twice expensive as that one
D. two times as expensive as that one
解析：考查倍数。倍数的表达有：倍数 + as + 形容词或副词的原级 + as + 其他；倍数 + 形容词（或副词）的比较级 + than + 其他；倍数 + the size / height / length / width. etc. + of + 其他。故选A。
