1) Julia rescued three cats.
Three cats were rescued.

2) The students handed in the reports.
The reports were handed in.

3) Maria crashed into the blue car.
The blue car was crashed into.

4) Alex learned the poem.
The poem was learned.

5) Steven has forgotten the book.
The book has been forgotten.

6) The mechanic has not repaired the DVD recorder.
The DVD recorder has not been repaired.

7) They play handball.
Handball is played.

8) Sue puts the rucksack on the floor.
The rucksack is put on the floor.

9) The girls had lost the match.
The match had been lost.

10) The teacher is not going to open the window.
The window is not going to be opened.