made Jim most excited was I think he had passed all the exams.A. That whatB. What wh

问题补充：

made Jim most excited was, I think, he had passed all the exams.

A. That, what

B. What, which

C. That, which

D. What, that

答案：

A. That, what

B. What, which

C. That, which

(答案→)D. What, that

解析：考查名词性从句。句意：我认为使Jim最兴奋的是他通过了所有的考试。what引导主语从句，做主语。that引导表语从句，不做句子成分。所以答案选D。