课时作业4
Ⅰ.阅读理解
(2017·河北省冀州中学高三年级考试)
The 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 batteryoperated toothbrush. Brush gently for 2 minutes, at least twice a day.
