Passive vs. Active voice - Exercises

Please rewrite these sentences in their passive form, pay attention to the changing tenses :
Ex :
Peter writes a letter.
=> a letter is written by Peter.
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1) Julia rescued three cats. (simple past)
=> ..................................................

2) The students didn't hand in the reports. (neg. simple past)
=> .................................................................

3) Maria crashed into the blue car. (simple past)
=> ..................................................................

4) Alex is learning the poem. (present continuous)
=> ....................................................

5) Steven has forgotten the book. (present perfect)
=> .............................................................

6) The mechanic has not repaired the DVD recorder. (neg. present perfect)
=> ...................................................................................................

7) They are supposed to be play handball. (simple present)
=> ...................................................

Sue puts the rucksack on the floor. (simple present)
=> ..............................................................................

9) The girls had lost the match. (past perfect)
=> ...................................................................

10) The teacher was not going to open the window. (neg. past continuous)
=> ........................................................................................................

11) I have done it before. (present perfect)
=> ..................................................

12) Sir Isaac Newton discovered the laws of the gravitational forces in 1665. (simple past)
=> ......................................................................................................

13) I've been playing soccer all the day long. (present perfect continuous)
=> ...............................................................................

14) The earthquake destroyed the infrastructure in Haìti. (simple past)
=> ...........................................................................................

15) Japan had imported the chinese characters before it became a written language. (past perfect)
=> ........................................................................................................................

Good luck

well i do it by my self

Three cats were rescued
The reports were handed in.
The blue car was crashed into.
The poem was learned.
The book has been forgotten
The DVD recorder has not been repaired.
Handball is played.
The rucksack is put on the floor.
The match had been lost.
The window is not going to be opened..............