-Who do you think him so angry? -I have no idea because I was not at home then.

分析问句，如果将它改为陈述句作答就是I think no one ________ him angry.需要的是谓语动词，描述过去的情况“让他生气”，而不是非谓语作宾补、状语。

语言学习中要学会分析句子结构。通过分析你可以在变幻莫测的题海中找到分析解题的金钥匙。比如本例所展示的句子，分析中我们发现这是主从句的疑问句式，比如我们还可以说When do you expect he'll come?/What do you suggest I should do?/ How soon do you suppose he'll finish the task?但如果用know则是Do you know when he'll come?有些书上将上述问句中的do you expect/think/suppose当作插入语对待，这种说法也未尝不行。