1. When Sarah got off the bus it was raining heavily; she __went_ into a shop to buy a new umbrella because she _had__(left) her old umbrella at home.
2. He (retired) from work early, but he _had__ (worked) hard all his life.
3. As soon as he ___(saw) her, he just ___(laughed).
4. As soon as he __(visited) her in hospital and knew she was all right, he (caught) the next bus home.