阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
There are many ways for students to go to school. Some students walk to school because they live _______ to their school. Some students live far ______ their schools, so they may go by car or bus. In big________(city), students can take the underground to go to school.
Now many people drive cars and the fresh______  is less and less(更少). I think going to school on foot is good for us.
First of all, walking to school is a wonderful way _______(exercise) and it’s good for health. _______, it’s fun to walk together with friends every day. We can talk about something interesting and know________ other. Then, if we walk, our parents won’t have to drive _______ (we) to school. There will be fewer cars on the road. More walking and less_____(drive ) helps to make our city cleaner.
I hope more and more students will walk to school. ______ everyone can do so, we will have a better life and a green world.