7 was bought 

8 is being painted 

9 will be built / is going to be built 

10 was bought 

11 be done 

12 is painted 

ex2

1 his car is washed every week

2 classrooms are swept by students everyday

3 my house was built ten years ago

4 look the bridge is being repaired

5 this school has been repainted since 2010

6 these doors should be closed before 9pm

ex3

1 will be bulit/ is going to be built

2 the english eat

3 was invented 

4 was discovered

5 produces

6 are produced 

7 wAs given ( ko chắc thì lắm tại câu chưa rõ cứ coi birthday đã qua vậy)

8 bought

ban tham khao 

2

7. bought  8.. is being painting  9. will be built 10. has been bought 12.is painted