问题
选择题
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
答案：D
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。
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