问题补充：
----I heard you bought a new house last week.
----Yes,it is my old one .
A. twice big than
B. the twice size as
C. twice as big as
D. two times of
答案：
A. twice big than
B. the twice size as
(答案→)C. twice as big as
D. two times of
解析：考察倍数表达法.倍数表达固定结构:倍数+as+形容词+as,其它选项结构不对,故选C,
