—When is the Dragon Boat Festival?

—It’s ________ May in Chinese calendar.

A.on B.in C.at D.from

答案：

B 【解析】句意：——端午节是在什么时候？——在中国农历五月。考查介词辨析。on用于具体某一天或某一天的早、中、晚前，星期或节日前；in表示一段时间，用于年、月、世纪、四季或泛指一天的上午、下午、晚上等前；at用于具体的时间点或黎明、正午、黄昏、午夜前；from说明开始的时间，谓语动词可用过去、现在、将来的某种时态。根据设空处后面的May，可知这里是用于月份的前面，所以应用介词in，故答案选B。

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