The author used to be a doctor but later gave up the ______ of medicine for full-time writing.
——I let my secretary call you several times. Do you know that? ——I _____in a meeting. I’m sorry.
It was only when I reread his poem recently _____ to appreciate its beauty.
—— Andrew won’t like it, you know. —— _____? I don’t care what he thinks of it.
I often read China Daily, ____of great help to my English study.
His father, who is said to be teaching in Australia, ____ in Nanjing University for more than 10 years.