,they went home,.A. Their work had been finished; singing and laughingB. They had finishe

,they went home, .
A. Their work had been finished; singing and laughing
B. They had finished their work; sang and laughed
C. Their work finished; singing and laughing
D. after their work finished; singing and laughing

A. Their work had been finished; singing and laughingB. They had finished their work; sang and laughed (答案→)C. Their work finished; singing and laughingD. after their work finished; singing and laughing解析：考查独立主格结构，分析句子，they went home是简单句，前面如果没有连词，就是独立主格结构，their work是逻辑主语，后面接非谓语动词，排除A，B，D项是有连词after的，所以后面的句子应该是their work had been finished;第二空使用现在分词做伴随状语，是回家的过程中同时做的事情，不是一连串并列动作。不能用sang and laughed ，选C。

我也是这个答案

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