what can i do 和how can i do两句是不是都符合语法规范?如果是,意思有什么不同?

please tell me ___ to improve my English.A.what i can do B.what can i do C.how i can do D.how can i do. I really do not know A what to do B how to do c how can i do说明理由 I really know___it A.what to do B.how can I do C.what I can do D.how 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 I want to know ( ) do to help my neighbord.A what I can B what can I C how I can D how can I ( ) can i do?填what 还是how ____ interesting work it is!I’m sure I can do it well.A.How B.What C.What an D.How good and____ interesting work it is!I’m sure I can do it well.A.How B.What C.What an D.How good and 麻烦说下A和C的区别 I can do （ ）I want to doA.what B.when C.how… What can I do better 和How can I do better?有没有这样说的?如果有, Don‘t lose your heart.I believe____you can do it wellA.thatB.what C.whichD.how （ ）can i do for you?A,what B,how C,where I don't know （）.can you help A.what to do it.I don't know （）.can you help A.what to do it.B.how to do it C.how to do D.to do how I can do()I want to doA,what B.how 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? i want to know＿＿ to help my neighbour.i want to know＿＿ to help my neighbour.A.what can i do B.what to do C.how i can do D.how to do How can I do I‘m not happy.How can I do?还是What can I do? I really don't know_____ about it.选择（初二）A how to do B what to do C how can I do D what can I do选什么?为什么?