It was difficult to tell exactly _______ the saying began, but it is possible that it was in the theatre or movie industryA.whereB.whenC.whyD.that
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A解析试题分析：考查宾语从句：句意：很难辨别这种说法是在什么地方开始的，但是可能是在剧院或电影行业。Tell后面接的是宾语从句，根据句意和in the theatre or movie industry.可知是询问地点，选A。考点：考查宾语从句