Помогите пожалуйста! 20 баллов дам! Срочно надо! понимаю что быстро не получится!

1. I never ask him any questions.2. Look! The teacher is drawing a picture on the blackboard.3. When did you buy the cassette?4. It's the best story I have ever read.5. I have never seen so funny monkeys.6. He enjoys playing the guitar.7. I wrote the exercises an hour ago.8. Who is using the telephone?9. The sandwich is on the table, isn't it?10. Jack has been to Rostov, hasn't he?