________ a child begins school, he enters a world of fierce competition where success and failure are clearly defined and measured.
They _________ laughing when they heard his funny voice.
Peter was disappointed to see the bike he had ________ went wrong again. A. repaired B had repaired C. repair D. to repair
All the crew _______ were killed in that heavy storm.
--- Did you see a man in black pass by just now ? ---- No, sir. I _________ a newspaper.
________ of talking about the same problem over and over again, he suggested bringing the meeting to an end.