问题补充：
The little town has now grown into a modern big city, and is what it used to be.
A. twice the size than
B. twice times the size as
C. twice the size as
D. twice the size of
答案：
A. twice the size than
B. twice times the size as
C. twice the size as
(答案→)D. twice the size of
解析：这里是考查倍数的表达法，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”。这符合第二种形式。
