6. Linh was given an Oxford dictionary last semester.
7. Many beautiful patterns have been added to the Ao Dai by designers. 
8. Maize isn't grown in this region.
9. Google or Yahoo website is often used to search for information. 
10. You will be sent a letter of invitation soon.

11. The faucet is being repaired in the bathroom by Mr Nam.
12. The project hasn't been finished by my sister yet.
13. The bridge was being repaired by the workers when it collapsed.
14. Trees are going to be planted in the school garden this weekend.
15. This sweater must be washed in warm water.

16. The economic situation couldn't be controled last year.
17. Pictures of the earth can be seen from the outer space.
18. The traffic system should be modernized by the government.
19. The clothes has to be washed by Mai everyday.
20. The correct answer can't be found out by student.