九牧三角阀20一个:I know what i'm going to do this summer

I know what i'm going to do this summer What if I don't know anyone 是I don't know what is the matter.还是I don't know what the matter is. I'm what i am什么意思? What can I find the happiness?I'm missing! 看一个选择题：I don't know what I'm going to( )Atalk to B talk with Ctalk D talk about i want to know what you are ? 这个句子是否有错误:what am i want ,i don't know. 问题：填空:I don't know what ______ ______ .I don't know where ____ ____. I'm getting old you know.(英译中)