Taobao.com is a free site, ________ visitors can not just buy almost all kinds of products but open
Taobao.com is a free site, ________ visitors can not just buy almost all kinds of products but open their own online shops．
A.whose
B.which
C.what
D.where
答案及解析： D
解析：
考查定语从句中引导词的判断。定语从句中缺少地点状语，故用where引导，修饰free site。