1. Color TV was invented in 1950
2. I was taken to HCM city by my father last week
3. Many souvenirs were bought in Nha Trang
4. The letter was read many times last night
5. Tim was met Hoa at the market yesterday
6. I didn’t be introduced to her mother
7. He was helped with this homework by Thu
8. I didn’t be invited tothe birthday party
9. The tree was planted by my father
10. That house was built in 1972