单选题 Kim went to visit the teachers in the primary school ______ he worked three years ago.
【正确答案】 B
【答案解析】[解析] 分析句子结构可知,空处为定语从句的引导词。定语从句的先行词是the primary school,为地点名词,且从句中缺少地点状语,所以应用关系副词where引导。