In addition to his traditional medical treatment, he tried to put himself in situations would bring about positive emotions.
A. which
B. where
C. why
D. as
网友回答
(答案→)A. which
B. where
C. why
D. as
解析：
这题考查定语从句的用法，分析句子结构发现定语从句中缺少主语，所以填which。句意是：除了传统的医疗方法，他尝试使自己置身于可以给他带来积极情绪的情境中。