Find and correct the mistake : 1. Animals were first dominated for food, and later become a source of skin, fur and wool.
2. He was doing a crossword puzzle while he is waiting for the train.
3. The children did their homework when their father came back from the office. 4. He played the guitar when someone opened the window and threw out a bucket of water.
5. What did you do between 9.00 and 10.00 yesterday? I was cleaning my house. I always clean my house on Sunday mornings. ​