如果你的回答是是，它意味着你已经为保护环境做了些有用的事。

　　26、 After you have finished the questionnaire, you may decide if your friend is doing very well in protecting the environment、

　　你完成调查问卷后，你可以决定你的朋友是否在保护环境方面做得很好。

　　27、 Has everyone in your class written a letter to a factory to ask them to stop pouring dirty water into the river or lake nearby?

　　你们班的人有没有给工厂写信让他们停止向附近的河或湖排放污水?

　　28、 How long have you worked in this library?

　　你在这家图书馆工作多久了?