1.Must I__my camera,Lily?--No,you__.Don't worry.I'll take on

1.Must I__my camera,Lily?--No,you__.Don't worry.I'll take one myself.
A.to take;mustn't B.take;needn't C.to bring;needn't D.bring;mustn't
2.The baby is too young.You__give her big pieces of food
A.may B.must C.may not D.must not
3.Whose exam paper is it?--It__be Li Lei's.He always forgets to write his name on it
A.can't B.must C.shouldn't D.may