Dưới đây là các dạng đúng của từ để hoàn thiện các câu đã cho:

1. **PERFORM**: performer
Câu hoàn chỉnh: She is one of the greatest **performers** to appear in this theatre.

2. **PERFORM**: performance
Câu hoàn chỉnh: The **performance** she gave last night was marvelous.

3. **ENCOURAGE**: encouragement
Câu hoàn chỉnh: She received a lot of **encouragement** from her mother.

4. **ARRANGE**: arrangement
Câu hoàn chỉnh: Does this **arrangement** suit you?

5. **ENTERTAIN**: entertainment
Câu hoàn chỉnh: Conversation is one of the most enjoyable forms of **entertainment**.

6. **ADVERTISE**: advertising
Câu hoàn chỉnh: **Advertising** is such a competitive profession.

7. **ADVERTISE**: advertisement
Câu hoàn chỉnh: Have you seen the latest **advertisement** for Pepsi?

8. **COMPETE**: competition
Câu hoàn chỉnh: There’s a lot of **competition** in the show business.

9. **COMPETE**: competitors
Câu hoàn chỉnh: There were 50 **competitors** in the talent contest.

10. **PHOTOGRAPH**: photography
Câu hoàn chỉnh: **Photography** is an extremely popular hobby.