The moment he had said this ,__________(regret) it. 用正确动词 过去完成时的形式

问题描述:

The moment he had said this ,__________(regret) it. 用正确动词 过去完成时的形式

He regretted it
这里的动词用过去完成时的形式不妥
因为说在前,后悔在后。

had regreted

regretted