A-A+ We have done things we ought not to have done 2022-08-05 19:01:40 问答库 阅读 171 次 问题详情 We have done things we ought not to have done and ________ undone things we ought to have done.A) leavingB) will leaveC) leftD) leave请帮忙给出正确答案和分析，谢谢！ 参考答案 正确答案：C
