1. We should use less electricity and water and reduce the trash that goes into landfills which helps protect the environment.

2. Employees are supplied with reusable coffee cups so that they will use fewer disposable cups

3. Students lose not only their interest in studying but also their healthy activities so they spend a lot of time on social networking sites.

4. Before the supervisor allowed us to go into the exam room, he asked us to turn off our cell phones

1.We should use less electricity and water and reduce the trash that goes into landfills, which helps protect the environment

2.Employees are supplied with reusable coffee cups so that they will use fewer disposable cups

3.Students lose not only their interest in studying but also their healthy activists so they spend a lot of time on social networking sites

4.Before allowing us to go into the exam room, the supervisor asked us to turn off our cellphones

5.The Internet has been the most exciting medium among all other forms of mass media