The plan to be carried out next month needs _______ among the members of the labor union before _________ .A.to discuss, carrying outB.to be carried out, carried outC.discussing, being carried outD.discussed, to be carried out
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C解析考查固定短语和动名词用法。Sth Need doing=sth need to be done需要做某事；before是介词，后面接动名词，根据句意可知计划和执行存在被动关系，所以使用过去分词表示被动。