It suddenly occurred to him _____ he had left his keys in the office.
—— Coffee _____ milk? —— Only milk, please, _____ I used to like coffee.
Father advised me not to say anything until_____ at the meeting.
You’re_____your time trying to persuade him. He’ll never join us.
Well, we have been waiting here_____for the guest.
—— Aren’t you be chairman? —— No, and I _____.