题目内容：

I’m sorry that I can’t afford（）such a computer.填什么

优质解答

afford for sth付得起
afford for doing sth 付得起
I’m sorry that I can’t afford for such a computer. 抱歉,我没钱买这样一台计算机.

追问：

没这个选项啊，就buying ，to buy，bought， to buying

追答：

buying