6. Minh ( not find ) …………………hasn't found……………….his pen yet.
7. My house ( rebuild) ……………………will be rebuilt…………..….next month
8. Nowadays, a lot of important inventions (carry out).........are carried out...........by scientists (work).....working...… for large industrial firms
9.We have just bought the pictures (paint)............were painted..........by Leonado Devinci.
10. Neil Armstrong was the first man (walk).........to walk.......on the Moon.