He is going to build a team that has a lot of potential and he thinks that isexcites him.A

问题补充：

He is going to build a team that has a lot of potential and he thinks that isexcites him.

A. that

B. which

C. what

D. as

答案：

A. that

B. which

(答案→)C. what

D. as

解析：考察表语从句。What excites him是一个表语从句，what引导起这个表语从句，并在句中作主语。故C正确。Which是指特定范围内的某一个。