Hearing their grandpa was ing, they began to ________ the work to prepare for a nice dinner.A.set offB.set downC.set asideD.set about
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C解析set off 出发,动身;使爆炸。Set down写下;看做..。Set aside 留出,把...放在一边,不顾;驳回,撤销。 Set about 着手 ,开始做...根据句意:听说他们的外公快要来了,他们开始放下工作去准备一个丰盛的晚餐。可知选择C。