how to do a meaningful thing

how to do a meaningful thing 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 we do not know______.a:how to do b:which to do c:what to do d:where to do Do you have an idea about________?A. what to do a survey B. how to do C. how to do a survey D. what to do it I really do not know A what to do B how to do c how can i do说明理由 how to do it? how to do how to do He does not know() A when to do B when to do C where to do D how to do 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 We need to learn（）A how to be polite B what to do it C how to do how do you do?A how do you do B nice to meet you C I am fine ,thanks how to create a blog?how to do myself a blog..n decorate? I DO not know ( ) it today A What to do B how to do C to do what I don't know _____ A.how to do B.which to do C.what do D.where to do i'm sorry he didn't tell me_______.A.how to do B.what to do C.how can i do it D.how i can do what to do as a man 还是 how to do as a man如题为啥? How do you make a decision to change your life?