Question

What’s the strongest part of your body? Your head? Bones? It’s your teeth. There is a special thing called enamel（牙釉质）in teeth. It is the hardest thing in the human body and keeps bacteria（细菌）away. However, teeth are hurt easily to problems and disease. September 20 is National Teeth-loving Day in China. Let’s pay attention to the health of our teeth.

Teeth problems are common around the world. Most children and young adults have tooth decay（龋齿）. A study which come out on China Health Monthly magazine this year showed that 40.74% of a sample（抽样）of 1,306 Chinese students under age 15 has decayed teeth.

Food that is rich in sugar increases the risk of tooth decay. After you eat, bacteria go crazy over the sugar on your teeth. The bacteria turn sugar into acids that eat away at tooth enamel. This causes holes in your teeth.

Another common problem is crooked teeth（龅牙）. When your new teeth begin to grow and the old teeth haven’t fallen out, there isn’t enough space for the new ones. This causes crooked teeth.

Don’t worry. Here are some ways to keep your teeth healthy.

◆Brush at least twice a day in the morning and in the evening.

◆Learn to use dental floss(牙线). The floss gets rid of food that’s hidden where your toothbrush can’t get it.

◆Visit a dentist. He or she can check if you have any dental problems and help you clean your teeth.

◆Pay attention to what you eat. It’s better to eat lots of fruit and vegetables instead of fries and drink water instead of soda.

◆Wear braces(牙套) to make your teeth straight and beautiful.

1.What’s the strongest part in the human body according to the passage?

A. Bones. B. Teeth.

C. Head. D. Bactria.

2.When is National Teeth-loving Day in China?

A. September 30. B. October 20.

C. September 20. D. June 5.

3.Crooked teeth refer to（指的是） _________.

A. decayed teeth B. the old teeth

C. the fallen teeth D. the new teeth

4.Which of the following is NOT true about decayed teeth?

A. Once you eat sugar, you must have decayed teeth.

B. Bacteria become strong over the sugar on your teeth.

C. Bacteria can turn sugar into acids that eat away at tooth enamel.

D. If you have decayed teeth, there may be holes in those teeth.

5.Which of the following is NOT a good way to keep teeth healthy?

A. Make your teeth straight with braces.

B. Brush your teeth twice a day or more.

C. Eat much fries or drink much soda.

D. See a dentist if you have dental problems.

 

Answer 1

1.B

2.C

3.D

4.A

5.C

【解析】

试题分析：这篇短文给我们讲述的是牙齿是我们身体上最结实的部分，但是我们的牙齿经常会出现一些问题，如龋齿和龅牙等，因此作者在短文中给我们提供了一些保护牙齿的方法。

1.细节理解题。根据短文的开头What’s the strongest part of your body? Your head? Bones? It’s your teeth.可知，作者告诉我们，我们身体上最结实的地方是牙齿。故选B。

2.细节理解题。根据短文第一段中September 20 is National Teeth-loving Day in China.可知，在中国9月20日是全国爱牙日。故选C。

3.细节理解题。根据短文中When your new teeth begin to grow and the old teeth haven’t fallen out, there isn’t enough space for the new ones. This causes crooked teeth.可知，当新牙开始长，而旧的牙还没有掉的时候，对新牙就没有足够的空间，因此就会形成龅牙。由此可知crooked teeth指的是新牙。故选D。

4.推理判断题。根据短文中Food that is rich in sugar increases the risk of tooth decay.可知，富含糖的食物会提高患龋齿的危险，但这句话的意思并不是一定会患龋齿。故A不对。根据短文中bacteria go crazy over the sugar on your teeth.可知B说的是对的；根据The bacteria turn sugar into acids that eat away at tooth enamel可知C是对的；根据This causes holes in your teeth.可知D是对的。故应该选A。

5.推理判断题。根据Wear braces(牙套) to make your teeth straight and beautiful可知A是对的；根据Brush at least twice a day in the morning and in the evening可知B是对的；根据Visit a dentist.可知D是对的。根据It’s better to eat lots of fruit and vegetables instead of fries and drink water instead of soda可知C不对，故选C。

考点：健康保健类短文阅读。