1. Many houses  in my neighborhood were destroyed  by the fire

2. Those books will be returned bacl to the library tomorrow by Tom

3. The entire block is being demolished

4.Flight 202 from Miami has been delayed by bad weather

5. Milk is used for making butter

6. Your room must be kept tidy

7. She wasn't seen at the party last night

8. The regulation has not been changed by the government

9.I wasn't introduced to her mother.

10. The grass  isn't being cut now

11. The window ought to be repaired

12. The new highway from North to South will be complete next year

13.  This sweater was made by my aunt for her son

14. We are teached grammar and writing

15. Lan's friends are going to be invited  to her birthday party

16. I was asked to be here by my teacher at 10a.m

17.A strange was seen in the garden last night

18. A lot of used paper have been collected by Nam

19.  Billions of cans were  thrown away every year

20. A lot of trees will be grown in the parks