Przekształcić na stronę bierną: 1) The driver found the box on the seat. 2) They built this church in the 15th centry. 3) They produce a lot of ears in Germany. 4) They storm has broken most of the trees. 5) Somebody will more this desk.

Box was found by the driver. This church was built in 15th cntry. Lots of ears were produce in Germany. Most of the trees were broken by the storm. This desk  will be more by somebody.   Nie wiem czy dobrze, ale raczej tak.  

The box was found on the seat by the driver. This church was built in the 15th centry. A lot of ears are produced in Germany. Trees were broken by storm.   Ostatniego nie wiem. Pzdr. PS nie Mam pewności na 100% czy jest dobrze. :)