问题
                    
Shall we go for a walk after school today —______. Will tomorrow be Ok
                            A:Sure, it’s up to you
B:Sure, no problem
C:Sorry, I’m not available today
D:Sorry, I can’t get it;
                        
                        B:Sure, no problem
C:Sorry, I’m not available today
D:Sorry, I can’t get it;
正确答案是:
                        