I do not know why this happened!

Why I do not know I do not know why this happened! I do not know why I am very sad Why l do not know.This is my feel.Understand?I do not know your mean. Do not know why I become so active!是什么意思 i do not know why my mother seems (be)happy I do not know why,I can not forget you,I still like you! I do not know I do not know ___he would not agree to this scheme?A.why do you know B.you know why C.you know th reason why D.do you know why 我想知道其余三个意思也都差不多,为什么不对呢? what i do not know is that why...是不是应该改为is it that why啊 Do not know why,I secretly Fall in love with you,and you did not find. Very simple,we do not know,why do I speak to you so much ah. I do not know why I fell in love with you什么意思 怎么读I do not know why,I will tell you,you are my night sky. 请问 I DO NOT KNOW sorry,i do not know! I love you Why You Do not Know My Why do not you trust me I said I'll wait f上面的意思是什么? 谁能说下