问题补充：
he wants to say is great an effort he has made to help her out.
A. That; how
B. What; what
C. What; how
D. What; that
答案：
A. That; how
B. What; what
(答案→)C. What; how
D. What; that
解析：考查名词性从句的连接词。he wants to say是主语从句，去从句缺少say的宾语，要用What引导，排除A； great an effort he has made to help her out是表语从句，且 great an effort是感叹句作made的宾语，修饰形容词great，用how引导。所以选C。
