-Iknowthepeopletherearedoingsomethingusefultoprotectthe...

问题详情：

- I know the people there are doing something useful to protect the environment.

-- I agree with you. I believe that those areas   　　 　with trees in a few years.

          A. are covered   B. will cover   C. are covering   D. will be covered

【回答】

D

知识点：动词语态

题型：选择题