题目内容：

The Healthy Habits Survey 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( 细 菌 )   in   your   mouth   each   morning   with   a battery-operated(电动的) 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 which doctors advise.

Step: We touch our faces around 3,000 times a day ─often inviting germs(细菌) 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 germ？

Finding: Seniors are not fighting germs as well as they should.

Step: 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(微波炉) for 10 seconds.

1.What is found out about American seniors?

A. All of them are fighting germs better than expected.

B. Most of them have good habits.

C. Nearly 30% of them bathe three days a week.

D. About one third of them brush their teeth only once a day.

2.Doctors suggest that people should wash their hands_________.

A. four times a day    B. twice a day

C. eight times a day    D. three times a day

3.Which of the following is true according to the text?

A. A kitchen sponge can carry more germs than a toilet.

B. There are less than 300 types of bacteria in the mouth.

C. We should keep from touching our faces.

D. We should wash our hands before touching a door handle.

4.The text probably comes from __________.

A. a book review    B. a popular magazine

C. a guide book    D. an official document(文件)