【求助】刘振民E9-9

Degler does more than merely summarizing existing research; he constructs a coherent picture of two centuries of study dealing with the changing roles of women.

A  Degler does more than merely summarizing

B  Degler's study is more than a mere summarizing of

C  Degler mere  has done more than summarizing of

D  Degler's study  has done more than summarize merely

E  Degler does more than merely summarize

答案是E，但是summarize不是应该用summarizes吗？还是我想太多，merely后面要跟动词原型？