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。