题目内容：

I found him_______because he could work out the problem easily.A smart Bis smart Cto be smart
Dboth A and C

优质解答

D
I found him_(to be) smart__

追问：

是否可以说明下理由？

追答：

find, think, prove, suppose consider 等词后面既可以接形容词，也可接 to be 不定式作宾补