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Ⅲ.Read and finish the tasks.阅读并完成任务。
March 20 is World Oral Health Day. It reminds us that we need to
take good care of our mouth.
Why does our mouth's health matter? A clean mouth helps our
stomach work well. It also makes us feel good about ourselves. If your breath smells bad or your
teeth are not straight,you may feel shy to talk to others.
What mouth problems do teenagers often have? One common problem is when teeth get
bad,you might see dark spots on your teeth,or feel pain when you eat hot or cold food.
Another problem is with your gums. If your gums hurt,that might mean you have this
problem.
How often should we brush our teeth? Brush them 2-3 times a day,and spend 3-5 minutes
each time. Don't brush them for too long. Remember to brush your teeth before you go to bed.
After eating meals,rinse your mouth with water.
Do we need to use floss and mouthwash? If your teeth are straight,use
floss once a week. If your teeth are not straight,use it every day. Don't use mouthwash for a long
time. It may bring harm to your mouth.
When is the best time to get braces? It's between 12 and 16 years old. At this age,
it's easier to move teeth into the right place. And straight teeth are also easier to keep clean.
(
A. It helps our stomach work hard.
B. It makes us feel shy to talk to others.
C. It makes us feel good about ourselves.
(
A. 1-2 minutes. B. 3-5 minutes. C. 6-8 minutes.
(
A. We should brush our teeth only in the morning.
B. We can use mouthwash for as long as we want.
C. If our gums hurt,we may have a gum problem.
(
A. How to Brush Teeth Well
B. All About Oral Health
C. Teenagers' Daily Habits
20. What else can help us keep our mouth healthy? List at least one way.
March 20 is World Oral Health Day. It reminds us that we need to
take good care of our mouth.
Why does our mouth's health matter? A clean mouth helps our
stomach work well. It also makes us feel good about ourselves. If your breath smells bad or your
teeth are not straight,you may feel shy to talk to others.
What mouth problems do teenagers often have? One common problem is when teeth get
bad,you might see dark spots on your teeth,or feel pain when you eat hot or cold food.
Another problem is with your gums. If your gums hurt,that might mean you have this
problem.
How often should we brush our teeth? Brush them 2-3 times a day,and spend 3-5 minutes
each time. Don't brush them for too long. Remember to brush your teeth before you go to bed.
After eating meals,rinse your mouth with water.
Do we need to use floss and mouthwash? If your teeth are straight,use
floss once a week. If your teeth are not straight,use it every day. Don't use mouthwash for a long
time. It may bring harm to your mouth.
When is the best time to get braces? It's between 12 and 16 years old. At this age,
it's easier to move teeth into the right place. And straight teeth are also easier to keep clean.
(
C
)16. What can we benefit from a clean mouth?A. It helps our stomach work hard.
B. It makes us feel shy to talk to others.
C. It makes us feel good about ourselves.
(
B
)17. How long should we brush our teeth each time?A. 1-2 minutes. B. 3-5 minutes. C. 6-8 minutes.
(
C
)18. Which of the following is correct?A. We should brush our teeth only in the morning.
B. We can use mouthwash for as long as we want.
C. If our gums hurt,we may have a gum problem.
(
B
)19. What can be the best title for the passage?A. How to Brush Teeth Well
B. All About Oral Health
C. Teenagers' Daily Habits
20. What else can help us keep our mouth healthy? List at least one way.
We can cut down on sweets or soft drinks,
and check the teeth regularly to keep our
mouth healthy.
and check the teeth regularly to keep our
mouth healthy.
答案
16. C 17. B 18. C 19. B
20. We can cut down on sweets or soft drinks,
and check the teeth regularly to keep our
mouth healthy.
20. We can cut down on sweets or soft drinks,
and check the teeth regularly to keep our
mouth healthy.
解析
【分析】
这是一篇介绍口腔健康的说明文阅读理解，解题时可以按照以下思路进行：1. 先快速通读全文，梳理文章脉络：文章依次介绍了世界口腔健康日、口腔健康的重要性、青少年常见口腔问题、正确的护牙习惯、整牙的最佳时间等内容；2. 对于细节类题目，带着题干关键词回到原文定位对应段落，将选项和原文内容逐一比对，排除错误干扰项选出正确答案；3. 主旨类题目需要覆盖全文核心内容，排除表述片面的选项；4. 开放性问题结合口腔健康相关常识，给出符合逻辑的合理建议即可。
【解析】
16. 定位原文第二段内容"A clean mouth helps our stomach work well. It also makes us feel good about ourselves."：选项A中"work hard"和原文"work well"不符，选项B是口腔不健康可能带来的负面影响，不符合题干"从干净口腔获益"的要求，只有C选项和原文表述完全一致。
17. 定位原文第四段内容"Brush them 2-3 times a day,and spend 3-5 minutes each time."，直接可知每次刷牙的时长是3-5分钟，对应选项B。
18. 逐一比对选项：A选项"只在早上刷牙"和原文"Remember to brush your teeth before you go to bed"表述矛盾，错误；B选项"可以长期使用漱口水"和原文"Don't use mouthwash for a long time. It may bring harm to your mouth."表述矛盾，错误；C选项"如果牙龈疼，我们可能有牙龈问题"和原文"If your gums hurt,that might mean you have this problem"（this problem指代前文提到的牙龈相关问题）表述一致，正确。
19. 分析三个选项：A选项"如何好好刷牙"只覆盖了文章部分内容，表述片面；C选项"青少年的日常习惯"和全文核心主题口腔健康不符；B选项"关于口腔健康的全部内容"可以完整覆盖文章介绍的口腔健康的意义、常见问题、护牙方法等所有内容，最适合作为文章标题。
20. 这是开放性问题，只要给出合理的护牙方式即可，符合口腔健康常识的表述都可得分。
【答案】
16. C 17. B 18. C 19. B
20. We can cut down on sweets or soft drinks,and check the teeth regularly to keep our mouth healthy.
【知识点】
阅读细节定位，阅读主旨归纳，口腔健康常识
【点评】
本题整体难度较低，绝大多数题目都可以通过原文直接定位匹配得到答案，既考查学生快速抓取文本关键信息的阅读能力，也能向学生科普正确的口腔护理知识，最后一道开放题也给了学生结合生活常识自主发挥的空间。
【难度系数】
0.8
这是一篇介绍口腔健康的说明文阅读理解，解题时可以按照以下思路进行：1. 先快速通读全文，梳理文章脉络：文章依次介绍了世界口腔健康日、口腔健康的重要性、青少年常见口腔问题、正确的护牙习惯、整牙的最佳时间等内容；2. 对于细节类题目，带着题干关键词回到原文定位对应段落，将选项和原文内容逐一比对，排除错误干扰项选出正确答案；3. 主旨类题目需要覆盖全文核心内容，排除表述片面的选项；4. 开放性问题结合口腔健康相关常识，给出符合逻辑的合理建议即可。
【解析】
16. 定位原文第二段内容"A clean mouth helps our stomach work well. It also makes us feel good about ourselves."：选项A中"work hard"和原文"work well"不符，选项B是口腔不健康可能带来的负面影响，不符合题干"从干净口腔获益"的要求，只有C选项和原文表述完全一致。
17. 定位原文第四段内容"Brush them 2-3 times a day,and spend 3-5 minutes each time."，直接可知每次刷牙的时长是3-5分钟，对应选项B。
18. 逐一比对选项：A选项"只在早上刷牙"和原文"Remember to brush your teeth before you go to bed"表述矛盾，错误；B选项"可以长期使用漱口水"和原文"Don't use mouthwash for a long time. It may bring harm to your mouth."表述矛盾，错误；C选项"如果牙龈疼，我们可能有牙龈问题"和原文"If your gums hurt,that might mean you have this problem"（this problem指代前文提到的牙龈相关问题）表述一致，正确。
19. 分析三个选项：A选项"如何好好刷牙"只覆盖了文章部分内容，表述片面；C选项"青少年的日常习惯"和全文核心主题口腔健康不符；B选项"关于口腔健康的全部内容"可以完整覆盖文章介绍的口腔健康的意义、常见问题、护牙方法等所有内容，最适合作为文章标题。
20. 这是开放性问题，只要给出合理的护牙方式即可，符合口腔健康常识的表述都可得分。
【答案】
16. C 17. B 18. C 19. B
20. We can cut down on sweets or soft drinks,and check the teeth regularly to keep our mouth healthy.
【知识点】
阅读细节定位，阅读主旨归纳，口腔健康常识
【点评】
本题整体难度较低，绝大多数题目都可以通过原文直接定位匹配得到答案，既考查学生快速抓取文本关键信息的阅读能力，也能向学生科普正确的口腔护理知识，最后一道开放题也给了学生结合生活常识自主发挥的空间。
【难度系数】
0.8
