问题补充：
I’m told that www．languagepractising．com is a free website learners can not just learn various languages but also chat online．
A. that
B. which
C. where
D. whose
答案：
A. that
B. which
(答案→)C. where
D. whose
解析：考察定语从句. a free website为下文内容的逻辑地点状语,故引导词用where,选C.
