Dưới đây là các từ được chia dạng đúng để hoàn thiện câu:

1. You can’t become a good student without doing **homework** every day.
2. An economist is a person who studies trade, industry and the **management** of the money.
3. We have got three sons. Our **oldest** son is 38 years old.
4. Smoke from the factory contains many different **poisonous** chemicals.
5. **Smokers** are people who never smoke.
6. Most of his **neighbours** are his relatives.
7. Good **communication** helps you succeed easier.
8. I’m sure she will win the **competition**.
9. I had her cut my hair. She is a **hairdresser**.
10. I don’t know the **relation** between them.