Найдите ошибку в предложения. 1. my brother doesn't never travel by train. 2. l have clean my room. we can go for a walk

1. My brother never travels by train. 2. l have cleaned my room. We can go for a walk now. 3. Have you ever been to the United Kingdom? 4. There were three wolves in the wild animal\'s park. 5. Why are these girls crying now? 6. There is a new table in the room, isn\'t it? 7. Mr. Smith\'s brothers are policemen. 8. My sister wants to be librarian.