题目

Have you ever taken part in a .阅读理解
Have you ever taken part in a marathon?A marathon is 42 km long.It is the longest race in the world.To make the runner’s body work,harder training is quite necessary.A runner should start to prepare for a marathon at least three months before.Preparation may have races,many hours of running at different speeds and changes in diet.During the training time the runner must eat a fit diet.The diet should have lots of things needed in training the players.
In the early days of training,runners run 80km per week.The running is increased every two or three weeks and at least two long runs per week are needed.Two weeks before the marathon,the training programme becomes less,from 100km per week down to 60km and then to 30km in the final week.On the last two days they may not run at all.
Breakfast should be eaten at least three hours before the race.Easily digested (消化) food such as cereal (谷类食物),toast(烤面包) and scrambled (碎的) eggs is best,with as m

提问时间：2020-09-30

答案

46、C.第一行就有.
47、A.第三行有.
48、D.容易消化的食物,在倒数第三行.
49、B.最后一行.
50、B.这个就不用解释了.