His uncle ____all night last 说明原因A.works B.was working C,working D.is working

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His uncle ____all night last 说明原因A.works B.was working C,working D.is working
His uncle ____all night last 说明原因
A.works B.was working C,working D.is working

His uncle ____all night last 说明原因A.works B.was working C,working D.is working
答案:B.was working
解析:因为句子的时间状语是last Monday,是过去时,所以谓语动词应该是过去式或过去进行时,选项中没有一般过去式,就要用过去进行时,另外all night 整个晚上也强调一直进行的动作
翻译:上周一他的叔叔整个晚上一直在工作.