问题补充：
The newly-built pavilion is the old one.
A. three times so big as
B3 times bigger than
C. as three times big as
D3 times the big of
答案：
A. three times so big as
(答案→)B. 3 times bigger than
C. as three times big as
D. 3 times the big of
解析：考查倍数表达。倍数表达的基本结构：
1. “A+倍数+形容词或副词的比较级+than+B”，表示“A比B大（长、高、宽等）多少倍”。
2.“A+倍数+as+形容词或副词的原级+as+B”，表示“A正好是B的多少倍”。
3. “A+倍数+the size/height/length/width， etc+of+B”，表示“A正好是B的多少倍”。
4. “……times+what+从句”。
新建的展览馆是旧的那个的三倍，故选B。
