According to a 1996 survey by the National Association of College an 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
The answer is E, but my choice is D. 此题考点是平行结构, as...as...应该连接的是两个句子，如果选E的话，则是句子和名词短语，不对称。请大家帮忙分析到底那个答案对，谢谢。 | 
