They didn’t pass the exam last time,I regretted _____.A:to be not able to help B:being not able to helping C:being unable to help D:not be able to help
问题描述：
They didn’t pass the exam last time,I regretted _____.
A:to be not able to help
B:being not able to helping
C:being unable to help
D:not be able to help
答
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
答
C
答
C:being unable to help