小题1:A小题1:C小题1:C小题1:C小题1:D
小题1:细节题：从最后一段的句子：Eat lots of fruit and vegetables and drink water instead of soda.可知选A。
小题1:细节题：从文章的句子：Spend at least three minutes each time you brush.可知答案是C
小题1:细节题：从文章的句子：Carefully move the floss between two teeth, up and down.可知答案是C
小题1:细节题：从文章的句子：Brush your teeth at least twice a day after breakfast and before bedtime. If you can, brush after lunch or after sweet snacks（快餐）, too.可知吃完蔬菜和水果也要刷牙。选C
小题1:主旨题：从文章的句子：Here are some advice for you to take care of your teeth.可知文章是如何保护你的牙齿。选 D