1.      They make Honda cars in Japan.

--Honda cars are made in Japan by them
2. You must keep your dogs in the garden.

-Yours dogs must be kept in the garden by you
3. We will issue the library cards soon.

--the library cards will be used by us soon
4. Passengers shouldn't throw away their tickers.

-Their tickets shouldn’t be thrown away by passengers
5. Candidates may not  use dictionaries.

-Dictionaries may not be used by Candidates
6. A machine could do this much more easily.

-This could be done much more easily by a machine
7. His family will see him off at the airport.

-He will be seen off at the airport by his family
8. He's a dangerous man. They ought to lock him up

-He ought to be locked by them because he’s a dangerous man
9. People must hand in their weapons

-their weapons must be handed
10. Thuy has to finish her homework tonight.

--her homework has to be finished by Thuy tonight
11. Today a large number of people speak English.

--English is spoken by a large number of people today
12. Someone stole all her valuable jewelry last night

-  all her valuable jewelry were stolen last night
13. A doctor has just examined John.

--John has just been examined by a doctor
14. The fire destroyed many house in my neighborhood.

-- many house in my neighborhood were destroyed by the fire
15. Tom will return those books to the library tomorrow.

- those books to the library will be returned by Tom tomorrow
16. Bad weather has delayed Flight 202 from Miam.

- Flight 202 from Miam has been delayed by bad weather
17. People use milk to make butter.

--àmilk is used to make butter
18 You must keep your room tidy.

-- your room must be kept tidy by you
19. Nobody saw her at the party last night.

-She wasn’t seen at the party last night
20. The government has not changed the regulation.

-the regulation has not been changed by the goverment
21. She didn't introduced me to her parents.

--I wasn’t introduced to her parents by her
22. Someone ought to repair this window

--this window ought to be repaired
23. People play soccer all over the world

--soccer is played all over the world .
24. They have just told us about that.

-we have just been told about that
25. My sister is writing that note in her notebook.

---that note ia being written in her notebook by my sister
26. They keep those maps on the shelves for renference

-- those maps on the shelves are kept for renference
27. They gave my little sister ticket.

--àmy little sister was given ticket by them
28. They have invited all the members to the party.

-- all the members have been invited to the party by them
29. They have put up banners and flags in the square.

-- banners and flags have been put up in the square by them
30. The tamer ordered the lion to lie on the floor.

--the lion was ordered to lie on the floor by the tamer