[答案]
(1)sixmonthsold.(2)three.(3)aftereachmeal.(4)thehole.(5)takecareofourteeth.
[解析]
(1)six months 。根据The set twenty to when are months ,故答案是six old。
(2)three.细节归纳题。根据First healthily very ,you brush teeth each ,try visit a a year.可知有三条建议。
(3)after each 。根据Also should your after meal.可知是每餐饭后都要刷牙 each 。
(4)the hole 。根据Third to a dentist(牙医)twice a there a hole a tooth a dentist fill it.If 可知指代的是上文的洞 hole。
(5)take care our 。根据But do take of teeth are ways help 。故答案是take of teeth。
[点评]
本题考查了"人与社会   细节理解   主旨大意   ",属于"难典题",熟悉题型是解题的关键。