1. My keys were find ⇒ found in the living room

2. Household rubbish is took⇒ taken to a large dump.

3. The local library located ⇒ is located near the local school.

4. The chair was fixed with ⇒ by Jim.

5. This fridge was bought in 2000 by my brothers. ⇒ by my brother in 2000

7. The organization were ⇒ was founded in 1970.

8. The streets are litter with ⇒ by rubbish

9.The old man helped⇒is helped by his grandchildren 

10.Many house were destroyed in⇒by the flood

=>
1. find -> found
-> bị động QKĐ was/were V3/ed
2. took -> taken
-> bị động HTĐ is/am/are V3/ed
3. located -> is located
-> be located : nằm ở
4. with -> by
-> bị động QKĐ : S was/were V3/ed (by O)
5. in 2000 by my brothers -> by my brothers in 2000
-> by O đứng trước trạng từ chỉ thời gian
6. cutted -> cut
-> bị động QKĐ : S was/were V3/ed (by O) (cut - cut - cut)
7. were -> was
-> chủ ngữ số ít (dùng was)
8. litter -> littered
-> bị động HTĐ is/am/are V3/ed
9. helped -> is helped
-> bị động HTĐ is/am/are V3/ed
10. in -> by 
-> bị động QKĐ : S was/were V3/ed (by O)