根据对话内容，从下面方框中选择适当的单词或短语填空，使对话内容完整正确，并将答案填写在答题卡标的相应位置上。
A: Hey! I met a student from a green school in Dalian.
B: A green school? 小题1: is it?
A: It is a school which supports the protection of the environment. In fact, there are 小题2: green schools in China. It’s wasteful to throw away glass, paper and metal, 小题3: every class in such schools collects waste that can be used again and then sells it for recycling（再利用）。
B: Great! What else do they do?
A: They also save energy and tricycle things at home, such as 小题4: lights and saving water.
B: If everyone tries to protect the environment, we will make the world much better.
A: I agree. If we don’t, the future is 小题5: .
B: Anyway, public concern over the environment has greatly increased. There is hope for the future.
