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.
has not only captured customers from other phone companies but also forced them
has not only captured customers from other phone companies, but it also forced them
has not only captured customers from other phone companies but also forced these companies
not only has captured customers from other phone companies but also these companies have been forced
not only captured customers from other phone companies, but it also has forced them
not only...but also的结构them似乎在指代customers
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