Constant practice has erased my accent to a point many people think I’m a native speaker.
A. which
B. what
C. where
D. when
网友回答
A. which
B. what
(答案→)C. where
D. when
解析：考查定语从句：句意：经常练习已经使我的英语到了很多人认为我是当地人的地步了。Point是先行词，表示“地步，阶段“，定语从句中缺少地点状语，用where引导定语从句。选C。