1.Thanks to the measures ______ by the local government , the polluted river is becoming clearer and clearer and fish have begun to show up in it.
A. taking B. taken C. to take D. having taken
【答案】B
【解析】非谓语动词。the measures与take之间是动宾关系，所以用过去分词短语作后置定语。现在分词的完成式不能作后置定语，排除D项。
