Pass voice ( câu bj động )

1. Dogs must be kept in the garden.

2. Passenger's tickets shouldn't be thrown.

3. Dictionaries may not be used.

4. This could be done much more easily by a machine.

5. He ought to be looked up .

6. Thuy's work has to be finished tonight by her.

7. He ought to be introduced to the village.

8. He can be seen at the airport.

9. The fire could not be put off.

10.The spectators are going to be presented the athletes.