I just wonder that makes him so excited?A. why it doesB. what he doesC. how it isD. what

问题补充：

I just wonder that makes him so excited?

A. why it does

B. what he does

C. how it is

D. what it is

答案：

A. why it does

B. what he does

C. how it is

(答案→)D. what it is

解析：

试题分析:考查强调句型。从句意判断wonder后面的宾语从句少主语，而疑问副词why和how不做主语，所以排除A、C选项；分析结构可知句中that不做成分，属于强调句型结构，所以D选项正确。句意：我只是想知道什么让他如此兴奋。