单选题 Many parents are busy sending their children to various talent show. ______matters to them is to turn their children famous overnight.
【正确答案】 D
【答案解析】解析：本题考查句子结构。空格处的句子有两个谓语动词matters和is，因此需要从句引导词，排除A和B。句子的主语为主语从句，what是正确的名词性从句引导词。