Hoàn thành bài tập sau

Doing regular exercise or playing sports can be dangerous, (25) _______ if you are over 40. This is why it is a very good idea to see your doctor (26) _______ starting if you think you are not very fit. Some people try to do exercise or play sports too vigorously too soon, and (27) _______ they cause themselves injuries which can take a long time to heal.

            However, it is not only older people who should take care. Doctors report many injuries such as backaches, sprained ankles and pulled muscles, which can all be (28) _______ if a little care is taken. If you do injure yourself, rest for a while to allow your body to recover naturally. Above all, don’t push yourself because you think it is doing you good. (29) _______ you could do yourself permanent damage.

25. A. as                                  B. even                        C. only                        D. especially

26. A. after                              B. before                     C. until                        D. while

27. A as a result                      B. despite                    C. in order that            D. otherwise

28. A. doubled                        B. avoided                  C. increasing               D. landing

29. A On the contrary          B. As usual                     C. By the way             D. In addition