请通读下面短文，掌握其大意，根据语法和上下文连贯的要求，从每小题所给的三个选项中选出一个最佳答案。Do you know China's Teeth Care Day? It falls 1 September 20th every year. It began in 1989, 2 aim（目标） is to take good care of people's teeth.
There 3 thirty-eight students in Wang Bin's class, and eleven of them have tooth problems.
Mao Kang said, "I had three bad teeth. Each tooth 4 me four hundred yuan."
Liu Jian said, "Something is wrong with my front teeth. I don't like to open my mouth. My classmates say my teeth look like 5 old's. 6 bad thing!"
Do you have good teeth, my friend? 7 you want to take care of your teeth, please follow the five suggestions:
◆Brush your teeth at least twice a day. If you can, brush them after every meal.
◆Brush your teeth slowly 8 carefully. Spend 9 than four minutes each time.
◆Do not use your teeth 10 bottles. It's very easy to hurt your teeth to do such jobs.
◆Eating and drinking are also important to your teeth. Eat lots of fruit and vegetables and drink water.
◆Try not to drink Coke or other drinks.
