Переделайте следующие предложения в страдательный залог, употребляя Present Continuous Passive и Past Continuous Passive.
Example: They are solving a difficult problem now. — The problem is being solved now.
1. Don't come in! The professor is examining students. 2. Can I read the article? — No, the secretary is typing it. 3. We had to hurry. They were waiting for us. 4. It was noisy. Nobody was listening to him. 5. Does he realize that they are laughing at him? 6. Look at this man. I think he is following us. 7. Listen carefully! He is giving a very interesting talk. 8. The waiter is serving us rather fast. 9. The secretary was looking through morning mail.