老师进来时,汤姆和山姆正在争吵（根据汉语完成句子）tom a fight sam .
问题描述：
老师进来时,汤姆和山姆正在争吵（根据汉语完成句子）tom a fight sam .
Tom·············a fight·············sam····················?
答
Tom was having a fight with Sam when the teacher came in.