5. The artist ought to sign the painting.
5. The painting ought to be signed by the artist.
6. Thousands of people will visit the gallery this year.
6. The gallery will be visited by thousands of people this year.
4. How many Hobbit films have they made?
4. How many Hobbit films have been made?
2. They are performing a ballet at the concert hall this evening.
A ballet is being performed at the concert hall this evening.
3. Does Lady Gaga design the costumes?
3. Are the costumes designed by Lady Gaga?