Finally,Tom _____ where he put his text book.He was happy.
问题描述：
Finally,Tom _____ where he put his text book.He was happy.
A.finds B.finds out C.found D.found out
Which one/ why?
答
d
过去式,可以排除a和b
find只是找的意思,根据上下文是要表达找到、找出的意思,因此用find out