Question

Bad breath, or halitosis(口臭)， can be a serious problem.

Bad breath is caused by some germs(细菌) that grow in the month. When you don’t brush in a right way, germs will leave between your teeth and make your breath smell bad. Certain foods, especially ones like garlic and onions can cause bad breath.  Smoking can also make bad breath.

Some people say that mouthwash(漱口水) will make bad breath go away, but it isn’t true. It only stops bad breath for a short time.

Some people also say that if you brush your teeth, you will not have bad breath. But the truth is that most people only brush their teeth for 30 to 45 seconds. It just doesn’t work. To clean all your teeth, you should brush for at least 2 minutes and at least twice a day. Remember to b rush your tongue, too—germs love to stay there.

If you do brush properly, but your bad breath still exists, visit your dentist for cleanings.  You may have a medical problem like germ disease.

If you don’t want to have bad breath, make sure you’re taking care of your teeth and month well.

1.What can cause bad breath according to the passage?

A. Germs , certain food and smoking    B. Germs, vegetables and drinking

C. Drinking, smoking and germs    D. Teeth, germs and smoking

2.The underline word “ garlic” means         in Chinese.

A. 蔬菜    B. 大蒜    C. 橄榄    D. 茄子

3.How long do most people brush their teeth according to the passage?

A. For 30 seconds.    B. For 45 seconds.

C. For 30 to 45 seconds.    D. For 2 minutes.

4.Which is the right way to brush your teeth?

A. To brush your teeth only in the morning.

B. To brush your teeth for at least 2 minutes and at least twice a day.

C. To brush your tongue twice a day.

D. To brush your teeth before and after meals.

5.Which of the following is true?

A. Mouthwash is the best thing to take away bad breath.

B. Bad breath may be a medical problem.

C. There aren’t any germs on your tongue.

D. You don’t need to go to the dentist if you have a bad breath.

Answer

1.A

2.B

3.C

4.B

5.B

【解析】这篇短文给我们介绍了口臭的原因以及如何防止口臭，短文中的作者给我们纠正了人们的一些错误做法，讲解了正确的做法。

1.细节理解题。根据短文第一段中Bad breath is caused by some germs(细菌) that grow in the month …Certain foods, especially ones like garlic and onions can cause bad breath. Smoking can also make bad breath可知，口腔里的一些细菌、某些食物，还有吸烟都可以导致口臭。故应选A。

2.词义猜测题。根据Certain foods, especially ones like garlic and onions can cause bad breath可知，garlic应该跟后面的名词onions是同一类的食物，能导致口臭，因此在这四个选项中B选项大蒜是可以导致口臭的，故garlic的意思是打算。

3.细节理解题。根据短文中But the truth is that most people only brush their teeth for 30 to 45 seconds可知，大多数人刷牙的时间是30到45秒钟。由此可知应选C。

4.细节理解题。根据短文中To clean all your teeth, you should brush for at least 2 minutes and at least twice a day.可知，想要清洁牙齿，我们刷牙的时间应该在至少两分钟，一天至少两次。由此可知应选B。

5.推理判断题。根据短文中If you do brush properly, but your bad breath still exists, visit your dentist for cleanings. You may have a medical problem like germ disease可知，如果适当刷牙，你的口臭仍然存在，这可能是有医学问题，由此可知B是正确的。根据短文中Some people say that mouthwash(漱口水) will make bad breath go away, but it isn’t true. It only stops bad breath for a short time可知A不对；根据Remember to brush your tongue, too—germs love to stay there可知C不对；根据If you do brush properly, but your bad breath still exists, visit your dentist for cleanings可知D不对。

点睛：这篇短文给我们介绍了口臭的原因以及我们应该怎么办。短文是科普说明文，但是内容还是比较容易理解的，因为短文解释的比较清楚，我们的常识也可以帮助我们理解短文。题目的设置以细节理解题为主，第5小题的判断题，也是基于文章的细节做的，这些题目的答案都可以在原文找到依据，是比较容易的。例如第3小题，我们可以用题目中的most people brush their teeth为关键词，在短文中搜索信息，就可以找到答案。第2小题是一个词义猜测题，根据这个单词所在的句子可知，划线的这个单词是一种食物，而且能导致口臭，所以结合选项就可以猜到这个单词的意思。