We did not know why they ------leave A had B had to C must Dmight

We did not know why they ------leave A had B had to C must Dmight We did not know why they ------leave A had B had to C must Dmight Why did you know?Why this world will not perish? why do you add me we do not know us why did not you Do not know why,I secretly Fall in love with you,and you did not find. we can learn what we did not know we can learn what did we not know请问,这两句话语法对不对,求指教 she did not know why （not to deal with） the difficult problem.选择题为嘛不选why (should deal with) why are we always tired,do you know?firstly if we can not sleep Why I do not know She did not leave here,do not know why?Perhaps I was touched by the sincere,right?She did not g Very simple,we do not know,why do I speak to you so much ah. We are what le?Why I will become like this,do not know who is wrong! why not we know our son of bitterness中文什么意思 I know we'll have no result,but I did not wish to we did not know each other before为什么吧before放到最后,什么表达方式 when i tear i.dont know why i did not come歌名是 什么?本人听力不好 Why do not we take a little break Did not we just have __?Ait C one D that选哪个?三者区别