Giúp mình bài từ loại này mới nhé nhờ mn giải thich tại sao lại điền loại đó nha:))) mình đang cần gâp ạ EX6: If you want to improve your overall level of fitness, running is one of the best sports to choose. It can increase the strength of your bones, it is good for your heart, and it can help with weight (1) . You will soon begin to see a significant (2) in your general heath and and if you are the sort of person who enjoys a challenge, then you could condider making the decision to run a marathon-a race of (3) 42 km. (4) runners and sports intructors say you should make a point of having a physical (5) with tour doctor before you start training. Another (6) is that anyone who has an old back, knee or ankle injury should take extra care. You should never use running shoes which hurt your feet or in which you fell (7) after a long run. It is a good idea to start by running slowly for about twenty minutes three times a week and (8) increase the number of km you run. You should find running long (9) progressively easier, and after a time, you may feel that even a arathon will be (10) 1.lose 2.improve 3.approximate 4.experience 5. check 6. recommend 7.comfort 8.gradual 9.distant 10.possiblity