A
Tht Healthy Habits Survey（调查）shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.
1.How many times did you brush your teeth yesterday?
·Finding：A full 33% of seniors brush their teeth only once a day.
·Step：Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes, at least twice a day.
2.How many times did you wash your hands or bathe yesterday?
·Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30%wash their hands only 4 times a day-half of the number doctors recommend.
·Step：We touch our faces around 3,000 times a day-often inviting germs（病菌）to enter our mouth, nose, and eyes.Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.
3. How often do you think about fighting germs?
·Finding：Seniors are not fighting germs as well as they should.
·Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge（海绵）that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.
1. What is found out American seniors?
A. Most of then have good habits.
B. Nearly 30%of then bathe three days a week .
C. All of then are fighting germs better than expected .
D. About one third of them brush their teeth only once a day
2. Doctors suggest that people should wash their hands_________ .
A. twice a day B. three times a day
C. eight times a day D. four times a day
3. The text probably comes from ________.
A. a guide book B. a popular magazine
C. a book review D. an official document
【答案】1. D 2. C 3. B
【解析】
【分析】本文是说明文。文章介绍了关于健康习惯的调查。在一天刷几次牙，洗手沐浴几次，以及多久考虑过和细菌战斗一次等方面描述了一些美国老年人的习惯，并给出了专家建议。
【1题详解】
D
细节理解题。根据A full 33% of seniors brush their teeth only once a day.可知，大约三分之一的美国老年人一天只刷一次牙。故选D。
【2题详解】
C
细节理解题。根据And nearly 30% wash their hands only 4 times a day----half of the number doctors recommend.可知，一天洗4次手是专家建议
一半，可知专家建议每天洗8次手。故选 C。
【3题详解】
B
推理判断题。由文章内容可知，这是一份调查报告，是针对美国老年人的健康习惯所做的调查。这样的文章理应不会出现在“旅游指南”，“书评 ”和“官方文件” 里，故排除 A、 C、 D。流行杂志做这样的调查报告很常见， 故选 B。
