She had great difficulty in understanding the lecture,you her.A.ought to have helpedB.should to helpC.must have helpedD.could help

分类: 作业答案 • 2022-01-02 13:53:49

问题描述：

She had great difficulty in understanding the lecture,you her.
A.ought to have helped
B.should to help
C.must have helped
D.could help

答

选A,
ought to = should
should have done 本应当做某事