What do you suppose him think so?A. to makeB. makingC. to have madeD. made

问题补充：

What do you suppose him think so?

A. to make

B. making

C. to have made

D. made

答案：

A. to make

B. making

C. to have made

D. made

解析：

do you think (believe, guess, etc)也是插入成分，但其后接的句子用陈述句语序.

What made him think so.