选 C
肯定句型为 It is in that school that you learn English every evening?
这是强调句型It is +被强调部分＋that从句
这个句子不是定语从句,所以不用where引导.
也可以理解成主语从句,it做形式主语,that从句是真正的主语.
但定语从句的时候,先行词是地点的话,可以用where
例如：I had lunch in the room,where I met him yesterday.这里定语从句就可以用where,在从句中充当状语成分