问题补充:
The book is that one.
A. three time as long as
B. three times as longer as
C. as three times longer as
D. three times the length of
答案:
A. three time as long as
B. three times as longer as
C. as three times longer as
(答案→)D. three times the length of
解析:考查倍数。书的长度不可用形容词long修饰,故用倍数+ the + n + of,根据句意选D。