The author used to be a doctor but later gave up the ______ of medicine for full-time writing.
When he was a little boy,he ______ on the farm.
-We want someone to design the new art museum for us. -_____ the young fellow have a try?
-Are you pleased with what he has done? -Not in the least. It couldn’t be ____.
-Everyone says you are a good student. You are never late for school,are you? -_______.
Don’t be joking. It’s time to ______ your business.