I was walking in the street when a piece of beautiful music came to my ears.I saw someone （1）some rubbish and walk to a truck which was collecting rubbish （2）.
As soon as the people nearby hear the music,they（3）go out with their rubbish and throw it in. It's a（4）way to help keep our city clean. Protecting our environment is very important（5）you live,you can do something useful in or around your neighborhood.（6）,we have done something to improve the environment. For example,we have collected（7）paper or bottles for recycling and we have planted
（8）trees or flowers in or near our neighborhood. If （9）makes a contribution to protecting the environment, the world will become much more （10）.