So that all the living things died out gradually .A. serious polluted the lake is B. seri

问题补充：

So that all the living things died out gradually .

A. serious polluted the lake is

B. serious polluted is the lake

C. seriously polluted the lake is

D. seriously polluted is the lake

答案：

A. serious polluted the lake is

B. serious polluted is the lake

(答案→)C. seriously polluted the lake is

D. seriously polluted is the lake

解析：倒装句型 so +adj/ad+（被修饰词）+主语，谓语