题目内容：

阅读短文，根据短文内容，从短文后的五个选项中选出能填入空白处的最佳选项。每个选项只能用一次。

Running is free,it’s easy and now it’s becoming cool as well.Many people do not have enough time to play a team sport ,so instead they have started going running.In the past,running in the street was seen as a bit silly.But things are changing.___ 1.___.Some people go to lose weight while others go simply to keep fit.Even at 6 o’clock in the morning you sometimes see runners in the streets.Scientists say that running is a very good way to keep fit.

___2.___.In some schools when it rains and it’s too wet to play football or hockey,children have to do cross country running instead.Now as running has become more popular,hopefully more young people will take it up.

Every year in April,the London marathon（?拉松）takes place.The race covers a fantastic route(?路) in which runners pass lots of the famous places like the London Eye and Big Ben.____ 3.___.

Interestingly,marathon running used to be seen as a hard sport,but now even people who are very unfit take part in marathons every year!____ 4._;it’s because people have become more interested in running .After the marathon every year the streets suddenly become full of runners.___ 5.__.All you need is a pair of trainers and will power,so what are you waiting for?

A.It’s not because marathons have got easier

B.People come from all over the world to run in it

C.Sadly, running is often quite unpopular at school

D.Now, lots of people go out running in their spare lime

E.People find it so exciting that they want to try it themselves