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Конечно! Вот решение: 1. While I *was copying* the exercise, my friends *were describing* a picture. 2. When we came in, the children *were cleaning* their desks. 3. We went her at the bus stop. She *was waiting* for the bus. 4. Some of the children *were skiing* while others *slept*. 5. Everybody *was having* a lot of fun. 6. When we came, the family *was getting* everything ready for Christmas. Bob and Helen *were decorating* the Christmas tree. 7. The girls *were feeding* the birds in the garden while the boys *were making* a bird-house. Если нужны еще какие-то пояснения, дай знать!