【单选题】Exercise is good for you, but most people really know very【C1】______about how to exercise properly. So when you try, you can run into trouble. Many people【C2】______that when specific muscles are exerc...
【简答题】单词填空。 Everyone knows that exercise is important. We all need to exercise. Doctors say i_____ (1) is good for us. It makes your heart and body s (2). Children who often exercise are more alert (灵活的). T...