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.