Question

We use teeth to eat and we need teeth to talk. But do you really know them? Let’s meet the “cool tools” in your mouth and learn how to protect them.

Unlike your brain or heart, your teeth are not ready to work when you are born. The first tooth usually comes out when a baby is 6 to 12 months old. Then more and more teeth begin to grow. Most kids have their first set of teeth at 3 years old. We call them baby teeth, and there are 20 of them. Baby teeth cannot stay with us forever. When you are 6 years old, baby teeth will start to fall one by one. They have to make room for your second set of teeth –adult teeth. You have to suffer the pain of growing adult teeth 12-13years old. An adult usually has 28-32teeth. Why pain?

A tooth with a hole is a decayed tooth(蛀牙).If you don’t clean your teeth regularly ,you’ll get one .Then germs(細(xì)菌)will build up and eat away your teeth._____________.

Tooth fairy(精靈)

In America, there is a lovely story for children. It is said that there are fairies for everyone’s baby teeth .Each time a child’s baby tooth falls out, he can put it under his pillow before sleeping .Then when he wakes up in the morning, he always finds money or a small present from the tooth fairy instead of his tooth in its place.

根據(jù)材料內(nèi)容選擇最佳答案，并將其標(biāo)號填入題前括號內(nèi)。

1.It’s normal for a baby if its first tooth comes out when it is _______.

A. three years old B. two years old

C. one year old D. one month old

2.The passage tells us that adult teeth are ________than baby teeth.

A. more B. less C. better D. many

3.The best way to prevent tooth decay is __________

A. going to the doctor often

B.giving up candy

C. looking for germs

D. cleaning your teeth often

4.Which of the follow is the missing part in the third paragraph?

A. Therefore, you need not to clean your teeth every day.

B. However, it is unnecessary to clean your teeth after eating candy.

C. So, try to clean your teeth after you eat candy or just eat less.

D.You just need to clean your teeth after eating too much candy.

5.What can we learn from the passage?

A. Children usually have 28 baby teeth.

B. The tooth fairy is just a story to cheer up children

C. We would never have decayed teeth

D. The adult teeth stop growing when a child is 10 years old.

Answer 1