题目内容：

根据短文内容，从下列五个选项中选择合适的句子填入空白处，使短文通顺。

 

A. you can get clean air when walking in the mountains　

B. you will forget all the problems in life　

C. having a picnic is the most wonderful thing to do　

D. you can walk there every day　

E. it's good for your health　

Do you like walking? Walking is a good activity and 1..

You can start with short walks around your house if it's safe(安全的) enough to do that. So you can try walking from your house to your nearby friends' houses. And if your school isn't too far from your home, 2..

When you are hiking(徒步旅行) in the mountains, forests, or other beautiful places, 3.. It's a good way to run away from them and you will be happier. Also, 4.. What's more, you can also do all kinds of things, like having a picnic, singing songs or taking pictures. And I think 5..