They didn’t pass the exam last time, I regretted _____.

来源:百度知道 编辑:UC知道 时间:2024/06/14 14:11:56
A:to be not able to help
B: being not able to helping
C:being unable to help
D:not be able to help

C:being unable to help

解析:C 上次他们没有通过考试, 我很后悔没有帮他们. 说明事情已经发生,我过去没有帮他们而感到后悔,所以用regret doing sth 表示对已做过的事情后悔, 而regret to do sth表示遗憾要去做还没有做的事情. be able to do sth / be unable to do sth 能做某事/不能做某事

C