I regret _______ you that we are unable to offer you a job.

I regret _______ you that we are unable to offer you a job.
A、in forming
B、having informed
C、to inform
D、to informing
【正确答案】：C
【题目解析】：考查regret的用法：regret doing后悔做过…,regret to do很遗憾要做…,句意是：我遗憾的通知你我们不能雇佣你。选C。