By the time you _________ your work this evening, I will be watching my favorite Korean TV series.

A．get through

B．had got through

C．will have got through

D．have got through

某城市在制定发展规划时，将某一区域确定为居住，商业和文化区，根据我国环境空气质量功能区分类和标准分级，下述哪一个是对该区的类别和执行标准的正确描述？（）

A.一类区，执行一级标准

B.二类区，执行二级标准

C.三类区，执行三级标准

D.二类区，执行三级标准