The young manager is well known for his problem-solving skills, is important for a successful leader.
A. it
B. that
C. what
D. which
网友回答
A. it
B. that
C. what
(答案→)D. which
解析：考查定语从句。先行词是 skills，从句缺主语，指物，故用D.that 不能引导非限制性定语从句。句意：年轻的经理以他解决问题的能力而出名，这对于一个成功的领导而言很重要。