Откройте скобки, используя Past Continuous…

1. When I reached the house, John had already left and driven towards London.2. We hadn't walked for half an hour when it began raining and we were sorry that we had not taken our umbrellas along.3. They had to sell the house, where they had lived so long and no wonder that while packing Mrs.Nelson had been crying silently.4. Nell had never been in such a rich house before.