问题详情：
—You look sad，'s wrong?
—I regret ______ back to my mother this morning.
A．talk B．talked C．talking
【回答】
C 答语句意“我非常懊悔今天上午与我的妈妈顶嘴”。regret doing sth.“懊悔做过某事”。
知识点：动词和动词短语
题型：选择题
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