2．
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 How Fit Are Young Teens?
How often do you exercise? A new study finds that most kids ages 12 to 15 aren't getting enough physical activity.
U.S. fitness guidelines recommend (推荐) an hour or more of physical activity every day. According to the study, only 1 in 4 U.S. kids meet the recommendation. Few kids in the survey met the guidelines for physical activity that raises the heart rate and makes you breathe harder. However, most of those kids said they did at least an hour of exercise at that level during the previous week.
The study found fat teens were less active than normal-weight girls and boys. Overweight girls were slightly less active than normal-weight girls.
“There's always room for improvement,” said health expert Tala.She also said the results provide useful information to help with fitness campaigns such as Let's Move, which was launched by First Lady Michelle Obama. To inspire kids to eat right and get in shape, the First Lady visits schools and holds exercise events. She also calls on schools to offer regular gym classes.
The research suggests kids who get physical education may get better grades.
A. It's concerning.
B. She is an expert on children's health.
C. She was the lead author of the study.
D. The results are based on about 800 kids.
E. Schools should give kids more time for physical activity.
F. But levels were similar among overweight and normal-weight boys.
G. Overall, about 25% said they got an hour of that kind of difficult exercise every day.
