It used to be thought _____ the Earth was flat.
After taking part in several rounds of competition, the athlete won first prize.
He is in deep sorrow, so it is not a(n) time to mention the subject.
He bought his girlfriend diamond ring, but he was told that diamond in that ring was an imitation glass.
— Doctor, I feel so nervous. — . It’s just a small operation.
Mary received training in business English for three months, ____she found a job in a big foreign firm.