His play was popular and every time ________ about it, he owed his success to the support of his friends．
A.talkingB.talkedC.to talkD.when talking在线课程A
解析：
考查分词做状语。Talk about it与he构成主动关系，故使用现在分词做状语。D项的when与every time重复。句意：他的戏剧非常受欢迎，每次谈论的时候，他都把成功归功于朋友的支持。