i do not know how to say and to do

i donot know ______
答案 A what to say or do B.what to say and to do C.how to say or do D how to say and to do
以上答案那个对？
请详细解答一下,谢谢.

I DO NOT KNOW翻译 I do not know if he..... I do not know 啥意思? You have asked many I-do-not-know questions. 急！！！ Do not know why your importance I am somewhat nervous I do not know any of them??是什么意思 I know you do not love me ever 是什么意思？ I know you know ,but i do not know!that just a joke.In fact,i know you know ,i know so如何解释最好 I am realy sad,and I do not know what I to do 请问I DO NOT KNOW WHAT SHOULD I DO 汉译英怎么译？