1.        According to a study by the Carnegie Foundation for the Advancement of Teaching, companies in the United States are providing job training and general education for nearly eight million people, about equivalent to the enrollment of the nation’s four-year colleges and universities.

(A) equivalent to the enrollment of

(B) the equivalent of those enrolled in

(C) equal to those who are enrolled in

(D) as many as the enrollment of（E）

(E) as many as are enrolled in

为什么选E呢，我选D。。。还有为什么大全的讨论连接里只有以前885的序号呢？987不重复的序号剔去哪里找讨论？？谢谢~~~

这题OG有解释啊

as many as前后对称    as前是people  后也因是people 这里可省略 (people)are

enrolled in

但是E  enrollment和people就不对称了