— We would appreciate it if you could stay for lunch.— Sorry, I . I have another appointment.
--- What do you think of my suggestion? --- I’m sorry. Er… I _______ about something else.
The newly-married couple quarreled so much that they reached the point _______ they had to separate from each other.
He was thinking about the problem when an apple fell off the tree, _______ him right on the head.
I’ve got so many problems _______ today that I’m afraid I won’t have time to have lunch.
--- Will you take up teaching as a career after graduation? --- Hard to say. I _______ go abroad for higher education instead.