They________assoonastheyarrive

发布时间：2020-07-27 18:56:40

They ________ as soon as they arrived.A.set out workB.seted out to workC.set out to workD.set out working

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C解析解析：由as soon as从句中的动词arrived可知应是过去时，set的过去式还是set，set out to do sth意为“着手去干某事”。
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