I always regret not ______ harder when I was young.A.studyingB.having studiedC.to studyD.to have studied

分类: 作业答案 • 2022-04-27 22:40:11

问题描述：

I always regret not ______ harder when I was young.
A.studying
B.having studied
C.to study
D.to have studied

答

B
regret doing sth
年轻时没有努力学习,所以用完成时