A smiling boy arrived home from a dental visit，"Hey mom，the dentist says I have no cavities. "

His mom stared at him wide-eyed and quite surprised，"It’s impossible --you never brush your teeth after cleaning the chocolate box before you go to bed!

Then the boy opened his mouth --he had not a tooth left!

小男孩儿看完牙医，面带微笑地回到家：“嘿，妈妈，牙医说，我一颗蛀牙也没有。”

妈妈惊讶地瞪大眼睛：“不可能——你每回上床睡觉前都把巧克力盒子里的糖一下子吃完，而且从来不刷牙！”

这时，男孩儿张开了嘴巴——他的牙全被拔光了。?