1. 用方框中所给短语的适当形式完成短文

make full use of    on foot   look after   on the other hand   throw away

    The earth is our homeland. We mustit. Do you think it's our duty to protect the environment? Sure, many famous persons have started living a green life to set good models for us. Some people go to work by bike or. Some people often reuse water. For example, when they finish washing clothes, they use the water to clean the floor or water flowers. As for students, we can also do things to help. Saving (节约) paper is necessary. Try tothem. Don'tthe used textbooks but give them to your brothers or sisters. And if we don't want to watch TV, turn it off. , we should plant trees as many as possible. It's really important to live a green life, a happier life!