---- Could I have a word with you?---- Sorry, I am busy ______. Shall we do it later?
—What do you think of teaching, Bob?—I find it fun and challenging. It is a job ______ you are doing something serious but interesting.
Life is like a long race ______ we compete with others to go beyond ourselves.
I have reached a point in my life ______ I am supposed to make decisions of my own.
Gun control is a subject ______ Americans have argued for a long time.
Whenever I met her, ______ was fairly often, she greeted me with a sweet smile.