We have done things we ought not to have
题型:选择题
问题:
We have done things we ought not to have done and ______ undone things we ought to have done.
A.left
B.leave
C.will leave
D.leaving
We have done things we ought not to have done and ______ undone things we ought to have done.
A.left
B.leave
C.will leave
D.leaving