题目内容：

3道英语改写句子~
He was behind bars （意思相同）
He was _____ _____
He purchased the vase for 100 yuan（意思相同）
He______100 yuan______ the vase
How to deal with the problem is still a hard nut（意思相同）
_____to_____with the problem is still a hard nut

优质解答

（behind bars 身陷监狱）
1.in prison (监狱）
2.paid...for （付款）
3.What solve(处理=deal with)