I was walking in the street when a piece of beautiful music came to my ears. I saw some-one 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_   .

1．A．picking up           B．pick up              C．throwing          D．throw

2．A．outside              B．inside        C．downstairs         D．upstairs

3．A．sometimes           B．really               C．slowly             D．usually

4．A．unusual              B．important            C．pleasant           D．common

5．A．Where              B．Wherever           C．When             D．Whenever

6．A．In that way          B．Since then          C．In fact            D．At last

7．A．small                B．waste               C．old               D．dirty

8．A．better               B．fewer               C．greener          D．more

9．A．everybody           B．somebody           C．nobody            D．anybody

10．A．useful            B．enjoyable            C．hopeful            D．beautiful