Задание 7. Найдите и исправьте ошибки

1. Our specialists can to speak both English and German. 2. Did your mother see the boys to swim in the river? 3. We are glad to have been written the course papers already. 4. Let me to read and to translate this text at home. 5. His book appeared to have been translate in some languages recently. 6. Both of you are write reports for this conference. 7. He watched them to make this experiment. 8. They seemed to listening to the reporter. 9. You should to visit him.