Dưới đây là các lỗi sai trong văn bản và cách sửa:

8. **Lỗi:** "Do you think bird-watching interesting?"
**Sửa:** "Do you think bird-watching **is** interesting?"

9. **Lỗi:** "I find playing volleyball interest because it is a team game."
**Sửa:** "I find playing volleyball **interesting** because it is a team game."

10. **Lỗi:** "I think that today more and more people are into play monopoly online with their friends."
**Sửa:** "I think that today more and more people are into **playing** monopoly online with their friends."