问题
选择题
The average temperature this year is _______ that of last year.
A．as not high as
B．not as high
C．not as higher as
D．not as high as
答案
答案：D
as...as用法：
as...as意为"和……一样"，表示同级的比较。使用时要注意第一个as为副词，第二个as为连词。其基本结构为：as+ adj./ adv. +as。
其否定式为not as/so +adj./ adv. +as。
故选D.