I. 

1. are often read by the children in the evening

2. is spoken in many countries

3. cars are made in Japan

4. is grown in the north

5. aren't raised on our farm

III

1. is being used by her at the moment

2. round the city is being opened

3. are being built down the street

4. is being prepared by Alex

5. being painted by Mrs.Brown 

II.

1. wasn't written by me

2. isn't written by Shakespeare

3. wasn't made by Alice

4. was asked several difficult questions at the interview by a man

5. was bought 2 years ago for a fee of $20000 by the club

6. The guitar was played at my last birthday party by him

7. The vegetables were watered by her yesterday morning

8. The tree was planted by Susan and Bob two days ago

9. Old furniture was sold at the end of the street by the man

10. Their care was washed in the morning

11. Chicken was fried in the kitchen by mom

12. Mary was given a diamond ring by Tom last night

13. Pop corn was eaten in the cinema by the dogs

14. Water at the river bank was drunk by Elly this afternoon

15. My class was taught Geography by Miss White last year

16. A story was read to her cat last night