I her, but I never could.A. ought to helpB. must helpC. ought to have helped D. must have

发布时间：2020-08-16 20:52:41

I      her, but I never could.
A. ought to help
B. must help
C. ought to have helped
D. must have helped

网友回答

A. ought to help
B. must help
(答案→)C. ought to have helped
D. must have helped
解析：本题考查ought的用法。ought to + have+done表示过去应该做某事却没做。
以上问题属网友观点，不代表本站立场，仅供参考！