补全对话
A:Hi, Wang Lin. Did you see the 8 o'clock program of CCTV 1 last night?
B :No. 1
A:About environment protection. It tells us some good ways.
B: 2
A:Well, we can start by saving water in our daily life.
B : Yes. 3
A:And we'd better not use plastic bags, either.
B:Good idea. 4
A:We can also save paper. 5
B:Right! Everyone can do something to protect our environment.
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