1 . It has to be a community-wide effort, and everyone can help by following the golden rule: reduce, reuse and ______.（根据句意填空）

2 . She ________________ to her students to exit the classroom in an orderly line covering their heads with their hands. （根据句意填空）

3 . We also work hand in hand with other branches of government to ensure that development ________________ are followed in an environmentally friendly way. （根据句意填空）

4 . The Amazon rainforest is home to a great ________________ of plant life. （根据句意填空）

5 . When my friend first ______ that we join the new Tai Chi Club at school, I hesitated.（根据句意填空）

6 . To start with, physical activity increases the ______ of your heart and lungs. （根据句意填空）

8 . Flexibility training helps ________________ your muscles and improve your body’s range of movement.（根据句意填空）

9 . As we walk the “path of life”, we may sometimes wish to be alone with our own thoughts, for quiet periods of________ can lead to personal improvement. (根据句意填空)

10 . But then my son became angry and we had a big ________. (根据句意填空)