用所给单词的正确形式填空。
【小题1】I become a volunteer because I want to make a __________（different）both to my life and to the world.
【小题2】He’d like to get some suggestions on how to learn __________（wise）and well.
【小题3】We won’t have a clear sky if air pollution is not __________（limit）.
【小题4】There is an __________（organize）called“Green Hope”working to protect the environment in our town.
【小题5】The old text books will __________（collect）and we will give them away to the Hope Middle School.