what to do how to do it我知道what后面不加it是应为what提前,充当了do的宾语可是为什么what to do with it这里的it一定要呢,是不是因为这里do的宾语不是what呢,望详解

WHAT TO DO=HOW TO DO how do you what to how to do it next还是what to do next 关于how to do it what to do what to do how to do it区别 how to do和what to do的区别 How to do What to do.的用法 how to do it what to do的区别 how to do it和what to do it的区别how to do it，what to do 的区别 l really don,t know _____ and _____.A.What to do,How to do B.what to do it ,how to do itC.what to do it ,How to do D.What wo do,how to do it how to do,how to do it,what to do 有何区别? how to do,what to do,what i can do的用法how to do,what to do,what i can do怎么使用? the teacher told us___and___A.What to do,how to do B.what do,how do it C.what to do,how to do it D.what to do it,how to do it we do not know______.a:how to do b:which to do c:what to do d:where to do what to do,what should i do区别what to do = how to do it?以及how to do it,how should i do it；what to do,what should i do的区别 How to do 还是 What to do?How加什么?What后加什么? I DO not know ( ) it today A What to do B how to do C to do what what to do 与how to do 的区别I don't know ____________.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