看了2遍og语法知道一般来说从句的主语代词一般指代主句主语，那如果是两个并列句子，后边一个中的代词一般指代谁呢？

eg:

248. By offering lower prices and a menu of personal communications options, such as caller identifica­tion and voice mail, the new telecommunications company has not only captured customers from other phone companies but also forced them to offer competitive prices.

(A) has not only captured customers from other phone companies but also forced them

(B) has not only captured customers from other phone companies, but it also forced them

(C) has not only captured customers from other phone companies but also forced these companies

(D) not only has captured customers from other phone companies but also these companies have been forced

(E) not only captured customers from other phone companies, but it also has forced them

C, the best choice,

A中的them