四、阅读与回答问题
We all know teeth are important to our life. So we celebrate National Love Teeth Day on 20 September.
Do you know the life cycle (生命周期) of teeth in your mouth? Children under 6 years old have 20 baby teeth. From 6 to 13, people lose their baby teeth one by one. Now permanent teeth (恒牙) begin to grow. Between the ages of 17 and 25, some people grow wisdom teeth (智齿). Of course, wisdom teeth don’t make you any smarter. They look like a symbol of being grown - ups.
Do you know how to keep your teeth strong and healthy? There are some easy ways. Let’s look at the following tips.
What we can do
Brush (刷) your teeth at least twice a day: in the morning and before bedtime. Brush for at least two or three minutes every time. Brush up and down on every tooth. Use a dental floss (牙线) for your teeth to make them cleaner. Get a new toothbrush every three months.
What we can’t do
Don’t eat too much candy or sweet food. Don’t drink too much soda (苏打汽水). Don’t eat very hard food. Don’t eat snacks before bedtime. They can hurt your teeth.
Teeth are important to everyone. Healthy teeth help us eat well and enjoy good food. They help us speak clearly. And yes, they help us look good.
1. When do we celebrate National Love Teeth Day?
On 20 September.
2. How many baby teeth do children under 6 years old have?
Twenty/20.
3. Why do we need to use a dental floss?
To make our teeth cleaner.
4. How often should you get a new toothbrush?
Every three months.
5. How do you keep your teeth healthy in your daily life? (请自拟一句话作答)
I brush them twice a day. / I don't eat too much candy.（言之有理即可）
