-------What is itmade Carl determined to give up smoking?--------Watching how his father d

问题补充：

-------What is itmade Carl determined to give up smoking?

--------Watching how his father died in pain from lung cancer.

A. which

B. how

C. who

D. that

答案：

A. which

B. how

C. who

(答案→)D. that

解析：通过分析句子结构，可知题目上文是强调句的特殊疑问句，基本结构是“特殊疑问词 + is / was + it that…?”因为去掉it is和that，剩下的是一个完整的句子，所以是强调句型。