Gạch 1 gạch dưới chủ ngữ, 2 gạch dưới động từ trong các câu sau

Gạch 1 gạch dưới chủ ngữ, 2 gạch dưới động từ trong các câu sau
1. Listening to music can be very relaxing
2. They bought a new car last week
3. To travel during the holidays can be expensive
4. What he wrote in the letter was touching
5. The dog barked at the stranger
6. Drawing is a favorite hobby of many people
7. To finish this project on time is crucial
8. Her smile brightens up the room
9. Playing chess requires a lot of patience
10. To understand the problem, we need more information