90.Since 1986, when the Department of Labor began to allow investment officers’ fees to be based on how the funds they manage perform, several corporations began paying their investment advisers a small basic fee, with a contract promising higher fees if the managers perform well. (A) investment officers’ fees to be based on how the funds they manage perform, several corporations began (B) investment officers’ fees to be based on the performance of the funds they manage, several corporations began (C) that fees of investment officers be based on how the funds they manage perform, several corporations have begun (D) fees of investment officers to be based on the performance of the funds they manage, several corporations have begun (E) that investment officers’ fees be based on the performance of the funds they manage, several corporations began ANS: D 请教D中的they可以指代of investment officers 中的officers 吗? 有一个帖子曾说过代词是否可以指代 n's a or a of n, 我认为这些n是修饰词,处于从属位置,A B E属于N'S a这种形式,不行;那a of n中的n可以由代词来指代吗?