The survey __________ our school last month shows that about 2 percent of the students are addicted to Internet gamesA.conductedB.having been conductedC.conductingD.to be conducted
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A解析动词conduct与主语the survey之间存在着动宾关系，所以需用被动形式，依据last month可知，该动作发生在过去，排除CD。而B项