Sorry to have kept you（ ）, but Mr. Drake is not in
举一反三
- I am sorry to have kept you ____.
- Sorry, I’m late. I ____________you waiting. A: should not keep B: should not have kept C: should have kept D: must not have kept
- I am sorry that I have kept you (wait) ________ for so long.
- 智慧职教: I am sorry to have kept you __________ (wait) for two hours.
- I am sorry to have kept you __________ for two hours. A: wait B: to wait C: waiting D: waited