If only I________what you wanted!

问题描述:

If only I________what you wanted!
A.knew B.know C.had known D.have known

要是我那时知道你想要什么那该多好
wanted过去时,表对过去的假设选择过去完成时C.had known
要是我(现在)知道你想要什么多好啊If only I__knew______what you want!