He speaks English well indeed, but of course not ________ a native speaker.

He speaks English well indeed, but of course not ________ a native speaker.

A.as fluent

B.more fluent than

C.so fluently as

D.much fluently than

答案及解析： C

解析：

本题考查表示比较的句型，由于空格内的词除了连词外，还应是副词作状语来修饰动词speak，故排除A、B两项，而D项中的much是用来修饰比较级的副词，而不能构成比较级，亦应被排除。