The medical community has been sounding the alarm: America's kids are (26)..... worse physical shape than they were 20 years ago. This is particularly appalling since overweight teens often grow into overweight adults, and (27)..... adults develop more heart disease, diabetes, gout, and arthritis. The New England Journal of Medicine reported that obese teenagers in the top 25 percent of their weight categories have twice the death rate in their 70s as people who were in good shape as teens. Researchers at Memphis State University and the University of Tennessee explored the link several years ago and were startled to find that kids' metabolisms were lower while they were watching television than when they were resting and doing nothing at all! The typical teen now spends almost 30 hours a week in front of the (28).... , while eating high-fat snacks. Great Exercises for Teens: Aerobic exercise is perfect (29).... teens who are independent. Some possibilities include running, in-line skating, cycling, swimming, boxing and (30)..... gymnastics. The American Heart Association suggests that teens should raise their heart rates for 20 minutes without stopping, three or more times a week, although a little muscle soreness can be expected, especially in the initial weeks of a workout program. Question 26: A. in B. on C. at D. with Question 27: A. a B.  C. the D. an Question 28: A. broadcast B. tube C. videos D. radio Question 29: A. to B. with C. for D. about Question 30: A. playing B. going C. taking D. doing