Exercise is one of the best ways of keeping fit. It improves your body and mind and enables you to perform (71)_________ in the work place and at home. Proper breathing is essential if you want to get the (72)_________ from exercise and you should also take into account your heart rate. It can be (73 )_________ to do too much at one time. That is why all good fitness instructors emphasize the importance of “listening to your body”. When you first start, you should use good judgments. It is easy to make mistakes of using the equipment incorrectly or doing too much at one time. (74)_________ slowly and build up gradually. To increase your fitness (75)_________ you should exercise for 20 minutes a day, 4 to 6 times a week. Then you will see a different both in your body and mind in only a few weeks. 71. A. good                      B. badly                      C. better                        D. worse 72. A. less                        B. most                       C. more                         D. much 73. A. harm                      B. harmless                C. harmfully                  D. harmful 74. A. Start                       B. Starting                  C. Starts                        D. Started 75. A. steadily                  B. badly                      C. wrongly                    D. difficultly