I am sorry( keep )_______ you waiting for so long .
举一反三
- I am very sorry ______ you waiting here for long .
- I'm very sorry ______ the whole morning. I forgot the appointment. A: to keep you wait B: to have kept you waiting C: to keep you waiting D: to keep you to wait
- I’m sorry you’ve been waiting so long, but it’ll still be some time _____ Brian get back.
- I’m sorry to keep you ____________ for a long time. (wait)
- I am sorry, I am so sorry, I am so extremely sorry.