根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。

A：Frank，I didn't see you in the soccer game last Sunday. （1）　 　

B：Oh.I went fishing with my father in the river near our town.

A：Did you have fun？

B： （2）　 　 The river was so dirty that there was no fish in it.

A：It's impossible.I went there 2 years ago. （3）　 　

B：There are many new buildings by the river now.Perhaps people living there throw litter into it.

A：That's terrible.We should do something about it.

B：We plan to write to the government to ask for more rubbish bins.

A：That would be helpful.Let's call on people not to drop waste into the water. （4）　 　

B：Good idea!I'll help to put them up this Saturday.

A： （5）　 　 She cares much about the pollution.

B：Sure!I'll call her tonight.

A.Not really. B.I can make some signs. C.Where did you go？ D.Why not ask Lingling to join us？ E.It used to be clean and beautiful.