I don't know when it is the right time___ the meeting.A to leave B to leave for C leave D leave for选A或B都能说通吧?

when it left scars can heal~i don't know~ I don't know when ( ) famous i don't know can i finish it when i go to school 语法对吗 I don’t know when it _____. When it ___ , I _____ some flowers in the woods. I don't know when leave 还是I don't know when to leaf i don't know when to do it.为啥要加it?而 when to go后则不需加别的啥呢? I don't know when I have been loving I don't know when you are available你什么时候有空这么写对吗When is it convenient for you Don't you know when three know it,all know it? I don't know ____if he can't do it.A what B when C where D how I don't know what it means = I don't know _________. i don't know how to do it句型转换i don't know[ ][ ][ ]do. 改错 I don’t know when will they come I don’t know when we shall start the work. 英语翻译I don't know when( )for Shanghai.(leave) But I don't know when he---------(go to bed) I don't know. I don't know.Do it how can i