问题补充：
He is going to build a team that has a lot of potential and he thinks that is excites him.
A. that
B. which
C. what
D. as
答案：
A. that
B. which
(答案→)C. what
D. as
解析：考查表语从句。本题中的What引导起表语从句，并在句中做主语。句意：他要建立起一支有巨大潜力的队伍，他认为那就是能让他兴奋起来的事情。That引导表语从句，不能在句中充当任何成分，which指…中的某一个；
