Training for a marathon requires careful preparation and steady, gradual increases in the length of the runs. 36 C. Before you begin your training , buy the best-fitting, best-built running shoes you can find. No one can say which brand will work best for you or feel best on your feet, so you have to rely on your experience and on the feel of each pair as you shop. When you have found shoes that seem right, walk in them for a few days to double-check the fit. 37 E. If they still feel good, you can begin running in them .As always, you should stretch(伸展) at least ten minutes before each run to prevent injuries.
马拉松训练需要认真的准备工作，在跑步长度上要循序渐进的增加。36. 在开始训练之前，买你能买到的最合适，质量最好的跑鞋。没人能保证哪个牌子最适合你或者你穿着最舒服，因此当你买鞋时，必须依靠你的经验及你试穿鞋时的感受。当你找到一双似乎不错的鞋子时，穿这双鞋走几天，再确认一下鞋子是否合适。37 E. 如果感觉仍然很好，那你就可以开始穿他们跑步了。和往常一样，为了防止受伤，在跑之前，要伸展至少十分钟，
During the first week, do not think about distance, but run five minutes longer each day. 38 . A. After six days, it is wise to take a day off to rest. But during the next week, set a goal of at least a mile and a half per run. 39 D. With each day, increase the distance by a half mile. After two weeks, start timing yourself. 40 G. Now you are ready to figure out a goal of improving distance and time. Depending on the kind of race you plan to enter, you can set up a timetable for the remaining weeks before the race.
A. After six days
B．For a good marathon runner
C. Before you begin your training
D. With each day, increase the distance by a half mile
E. If they still feel good, you can begin running in them
F. Time spent for preparation raises the quality of training
G. Now you are ready to figure out a goal of improving distance and time
36. C 37. E 38. A 39. D 40. G