GWD24-Q20 求助

菠萝蜜夭夭

GWD-24-Q20:
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
正确答案是E 我选了D
为什么D不可以呢？as/than做比较从句的主语，那么D的话不是就正确吗？
类似于：
218. (GWD7-Q4)
Only seven people this century have been killed by the great white shark, the man-eater of the
movies—less than those killed by bee stings.
A. movies—less than those
B. movies—fewer than have been
C. movies, which is less than those
D. movies, a number lower than the people
E. movies, fewer than the ones
正确答案B than指代了people

菠萝蜜夭夭

没有人咩

Marlene1212

发表一下小意见哦，这里的as many as 前后应该是相同性质的词性吧，前面是institutions and fees  ,则后面接的比较也应该是同样的 即是名词 ， 在D 中直接与动词charge 比较就当然不合适啦，在E选项中就是与those比较然后 charging 作为分词修饰those不是很完美么