Sure, I'd be happy to help you with these sentences. 5. The doctor advised him to get up early. 6. The students are playing with the ball in the schoolyard now. 7. She didn't use to work hard. 8. Mary visited Ha Long Bay last week. 9. Nga has not prepared her lessons yet. 10. He was watching television when the telephone rang. 11. English is spoken all over the world. 12. Unless she studies hard, she won't pass the exam. I hope this helps! Let me know if you have any other questions or need further assistance with anything else related to English language learning.