根据对话内容，从方框中的七个选项中选出五项能填入空白处的最佳选项。

A.But your report may not be the best. B.How great your idea is! C.It is a good topic. D.It’s said some factories pour waste water into the river near our city. E.Would you love to do it with me? F.What a pity! G.Well, our environment needs everyone’s effort.

Anna: What is the topic of your project?
Alice: About pollution in our city.
Anna: 
Alice: The pollution is rather serious.
Anna: It may pollute our water.
Alice: We should do a survey near the river and take action.
Anna:  
Alice: I'll write my report and do something for it. 
Anna: Sure! Let's work together.
Alice: The city is our home.It is our duty to make it clean and beautiful.
Anna: