Wewillcelebratethe90thbirthday

发布时间：2020-07-27 23:26:10

We will celebrate the 90th birthday of the Chinese Communist Party ________ July 1st, 2011．A.onB.atC.inD.during

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A解析A考查点：考察介词辨析．解题思路：具体到某一天用介词on．故选A．
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