【简答题】Why Exercise Is Cool? 1. Exercise Strengthens Muscles Did you ever do a push-up or swing across the monkey bars at the playground? 小题1: By using your muscles to do powerful things, you can make them s...
【单选题】Exercise is good for you, but most people really know very【B1】about how to exercise properly. So when you try, you can run into trouble. Many people【B2】that when specific muscles are exercised, the fa...