---Mr. Black, I find ______ difficult to play the piano well.---Oh, I think you just need to practice more
It’s your job________ the pop stars.
I don’t know ______ a show. Can you tell me?
---It is selfless ______ the doctor to devote all the time he had ________ for the patients.--I think so, they are so great.
I agree with most of what you said, but I can’t agree with ______.
--- Sharon, remember to lock the door before leaving the house.-- ______.