题目：
What is 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 vulnerable (易受伤害的) to problems and disease. September 20 is National Teeth-loving Day in China. Let’s pay attention to the health of our teeth.
Tooth (1) are (1) around the world. Most children and young adults have tooth decay (龋齿). A study published on China Health Monthly magazine this year showed that 40.74 percent of a sample (抽样) of 1,306 Chinese students under age 15 had decayed teeth.
(2)Food that is rich in sugar increases the risk of tooth decay. After you eat, bacteria go crazy over the sugar on your teeth, like ants at a picnic. The bacteria turn sugar into acids (酸) that eat away at tooth enamel.This cause 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 before bedtime.
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 is better to eat lots of fruits and vegetables instead of fries and drink water instead of soda.
Wear braces (牙套) to make your teeth straight and beautiful.
小题1:在（1）处的空白处分别填入一个适当的词使句意完整、上下文通顺。
小题2:将（2）句译成中文。
小题3: 回答问题：How many ways to keep your teeth healthy are mentioned in the passage?
小题4:在文中找出与 Most kids and young people have decayed teeth.意思相同或相近的句子，并将它写在答题卡上。
小题5: 在文中找出最能表达该短文主题的句子，并将它写在答题卡上。
答案：
小题1:problems, common
小题2:富含糖分的食物增加了患龋齿的风险。
小题3:5
小题4:Most children and young adults have tooth decay.
小题5:Let’s pay attention to the health of our teeth.
题目分析：短文大意：牙齿问题是世界上的一个普遍的问题。在中国九月二十日是全国爱牙日。让我们关注我们的牙齿健康吧。本文提供了一些方法来保持你的牙齿健康。一天至少刷牙两次。学会使用牙线。看牙医。注意你吃的东西。带牙套使你的牙齿直而美丽。
小题1:根据后文Most children and young adults have tooth decay (龋齿). A study published on China Health Monthly magazine this year showed that 40.74 percent of a sample (抽样) of 1,306 Chinese students under age 15 had decayed teeth.可推知此处是在说牙齿问题是世界上的一个普遍的问题，所以可在空白处填写problems, common。
小题2:富含糖分的食物增加了患龋齿的风险。
小题3:根据文中谈到的保持你的牙齿健康的方法有： Brush at least twice a day. Learn to use dental floss (牙线). Visit a dentist. Pay attention to what you eat. Wear braces (牙套) to make your teeth straight and beautiful.可知该作答：5。
小题4:Most kids and young people have decayed teeth 的意思是大多数孩子和年轻人有蛀牙，在文中的句子Most children and young adults have tooth decay.和它意思相同。
小题5:本文旨在告诉人们要注意牙齿健康问题，所以文中句子Let’s pay attention to the health of our teeth. 最能表达该短文的主题。
