X. Write questions for the underlined parts in the following sentences.
1. My favorite musician is Trinh Cong Son.
2. The opera was first performed in 1992.
3. Music can help relax and feel rejuvenated.
4. We take a holiday once a year.
5. The concert are usually held at the university.
6. I like classical music.
7. Vietnam has 54 ethnic groups.
8. Kinh people account for 87% of the country's population.
9. The other 53 ethnic minority groups mainly inhabit in mountain areas.
10. The Cham people once boasted a flourishing culture early in the history.