I don't really know where one begins and the other ends in c

I don't really know where one begins and the other ends in c But just where the one ends and the other begins, you cannot My love in the other city I don`t know where you from 帮译下吧　多 I really don't know where to I really don't know how to do and where to go next.____(改错) I really don't know where I can find my lost key to the bike I really don't know()Ikept the secret papers. A it was where I really don‘t know which one to buy I really don't know which one to choose i really don't know I really don't know if I can borrow the book in __ l really don`t know where __.