题目

Every person has two sets of teeth.The first set of twenty begins to grow when you are over six months old.The second set of thirty-two grows from the age of six until you are about twenty-one years old.
To help your teeth grow strong,you must drink plenty of milk and eat greens.
You should brush your teeth after each meal.Then few bits of food will be left on or between them to cause decay（腐烂.) Make sure that you turn the brush and go up and down as well as brushing side ways.Use dental floss to make sure all food is cleaned up from in between each tooth.If you cannot brush your teeth after eating,look after them with water,or eat an apple or a carrot.
How to __________ our teeth?
Number of the first set of teeth is _________.
The second set of teeth usually grow for _______ .
Milk and greens can make our teeth __________.
__________ left in our mouths may cause decay.
After meals we should __________our teeth.
We should visit a __________ twice a y

提问时间：2020-10-10

答案

您好,以下为正确答案：
1.protect
2.twenty
3.years(或long)
4.strong
5.food
6.brush
7.dentist
8.let
9.spend
10.keep