——Mom what did your doctor say?—— He advised me to live the air is fresher.in where B. in

问题补充：

——Mom，what did your doctor say?

—— He advised me to live the air is fresher.

in where B. in which C. the place where D. where

答案：

解析：通过分析句子结构，可知这个句子中包含一个宾语从句。且引导词在宾语从句中作地点状语，故用关系副词where。