He speaks English well indeed, but of course not a native speaker.
A. as fluent as
B. more fluent than
C. so fluently as
D. much fluently than
网友回答
A. as fluent as
B. more fluent than
(答案→)C. so fluently as
D. much fluently than
解析：此题考查So adj./adv. As和as adj. / adv. As 用法，前者主要用于否定句，在这里要修饰谓语动词，故选C。