求助GMAT一道语法题

来源:百度知道 编辑:UC知道 时间:2024/05/27 19:55:02
According to a 1996 survey by the National Association of College and University Business Officers, more than three times as many independent institutions of higher education charge tuition and fees of under $8,000 a year than those that charge over $16,000.

A. than those that charge
B. than are charging
C. than to charge
D. as charge
E. as those charging
我选的是D,而答案是E,应该是考察平行结构,但是E是如何平行的忘高人指点
后面的as those charging很明显不是句子

as......as的平行结构

E: as+句子......as+句子构成的形式平行。

D选项:as charge,charge缺乏主语,无法和前面的many independent institutions of higher education CHARGE tuition and fees...平行。