问题
                    
What do you think we can do for our parents? –You ____ do anything except to show your love — a kind word, a warm smile and a helping hand.
                            A:can’t
B:oughtn’t to
C:don’t have to
D:mustn’t
                        
                        B:oughtn’t to
C:don’t have to
D:mustn’t
正确答案是:
                        