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：句意：他说英语的确说的非常好，但是当然不如本地人说的那么流利。后半句补充完整为：but of course he does not speak so fluently as a native speaker.所以选C。