Ответьте на следующие общие вопросы утвердительно и отрицательно:

1. Did you phone your friends yesterday? 2. Did you help your mother on Sunday? 3. Did you cook dinner yesterday? 4. Did you stay at home yesterday evening? 5. Did you watch TV yesterday evening? 6. Did you translate articles last week? 7. Did your parents study English at the university? 8. Did you visit your friends the other day? 9. Did you play the piano when you were a child? 10. Did your parents live in Moscow twenty years ago? 11. Did they work at the hospital?