Here are the answers to the questions in yesterday's story on common mistakes in English usage revealed by a word power online quiz organised by Hong Kong Education City and CQchess.com. 1. The fire caused a lot of damage. 2. I think every job has its merits. 3. We watched the train leave the station. 4. She couldn't help laughing. 5. It was a 12-hour trip. 6. He kept telling the same joke again and again. 7. I'm looking forward to hearing from you. 8. I asked him to explain what he meant. 9. One cannot succeed unless one works hard. 10. The meal was terrible but there was no point in complaining.