Common Sense 常识Jane and her mom are walking home with their new puppy.Jane:The PUPPY is smelling the bin!How disgusting!Why is he doing that?Mom:Dogs use their sense of smell to remember people and places.Jane:Can't he see?Mom:Yes!He has a good sense of sight and hearing,but he has a really good sense of smell.Jane:Now,he is smelling the road.He wants to cross.Shall we go?Mom:Wait for the green light!Use your common sense!