问题
                    
A: David, remember to turn off the lights before leaving the house.B: ________
                            A:It doesn’t matter.
B:Yes, please.
C:It’s hard to say.
D:Ok, I will.;
                        
                        B:Yes, please.
C:It’s hard to say.
D:Ok, I will.;
正确答案是:
                         
                        
                        
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