1. 听录音，将表格所缺的关键信息填写在相应位置上。                                                                                                                 

Greg	I met him when we were  years old. We started school together on the same day.	We often meet on weekends and do a lot of cycling together.
Peter	years ago, his family came to live in the house next to us.	We usually go to school together . We sometimes help each other with our homework.
Michael	A month ago we met at the birthday party of my .	We meet about three times a week and we go to the  together every Saturday.

The environmental pollution is more and more serious today. We have no clean water to drink because of water pollution. People's health has been greatly affected by air, noise and water pollution. Many people die of diseases. In order to live a better life, it's time for us to protect our world.<br />Firstly, we shouldn't throw away rubbish everywhere. Secondly, we should recycle, reduce and reuse things, for this saves money and reduces pollution.<br />Thirdly, use things as long as possible. Don't use plastic bags. At last, we must plant more trees and stop people cutting them. We hope our world will be more and more beautiful.