从方框中选择合适的选项补全对话。
A: Where have you been, Li Hai? I called you, but you weren't in.
B: ____
A: ____
B: I found that the factory was pouring waste water into the river near it. Lots of fish have died.
A: ____
B: Do you think “Greener China” can do something?
A: ____ if they know about this thing, they will prevent it. Let's write to them at once.
B: ____ I think everything will become better.
A. What did you do there? B. Good idea. C. Yes, of course D. That's terrible.
E. I've been to a chemical factory
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