There are lots of plastic bags in the river it very dirty.A. floating; makingB. to floa

问题补充：

There are lots of plastic bags in the river, it very dirty.

A. floating; making

B. to float; made

C. being floated; made

D. floated; making

答案：

(答案→)A. floating; making

B. to float; made

C. being floated; made

D. floated; making

解析：因为整个句子已经有谓语动词，故应用非谓语动词，第一空bags与float之间是主动关系，故用现在分词表示主动与进行；第二空making来表示自然而然产生的结果。故选A。