People don't know__________.A who we are B what you to C how

Why don't you tell her ----------?A.how to do B.what to do C （ ）We don't know ______.A.how to do B.which to do C.what to You don't need anybody to tell you who you are or what you a I don't know _____to send e-mail.A.how B.what C.which D.who I really don`t know_____ A.what to do it B.how to do C.what ( ) are you?l'm fine ,and you?A What B Who C How __beautiful music we are listening to!A.How B.What a C.What I don't know_______ to help him. A. how should we do B. what We don't know how -------English A,learn B,learning C,to lea we don't know _____?A:what do we do B:what to do C:what do w I don't know ( ).A.what to do it B.how to do it C.what to do We need to learn（）A how to be polite B what to do it C how t