----- Nội dung ảnh ----- 1. Complete the sentences with a suitable article: a, an, the. 2. This is considered the land of elephants in Vietnam. 3. You can see the unique custom of this ethnic group. 4. My brother doesn't like the present I gave him. 5. Did you buy a pair of trousers yesterday? 6. He can play piano well. 7. He is 3rd son in the family. 8. All of the boys were present. 9. We saw a snake in the grass. 10. Despite at the age of 30, he doesn't want to work to earn money. 11. He hit himself with a stick. 12. Although it was late, we still went out for a while. 13. She is a famous doctor. 14. I saw an old man in the street.