1. He is twelve years old. => He is at………the age of 12……………….…………..

2. Lam is fifteen years old. => Lam is……………at the age of……………..…fifteen.

3. My father is forty years old. => My father is………………..at the age of 40……………

4. Mr. Tuan is at the age of sixty. => Mr. Tuan is………60 years……….…………….old

5. My mother is thirty-five. => My mother…………is at the age of 35……….……………

6. Nam is twelve years old. => Nam is…………at the age of 12………….……………..

7. Mr. Tuan is at the age of 45. => Mr. Tuan…………………….is 45 years old.…………..

8. Miss Nga is at the age of nineteen. => Miss Nga…………is 19 years old…………………

9. Trung is at the age of fourteen. => Trung is……………14 years old………..…………

10. Nam and Ba are eleven years old. => Nam and Ba…………are at the age of 11……….……