Question

Rewrite the following in the passive somebody left a box on the no.53 bus last night. a woman found it under her seat. she gave it to the bus driver. no one knows where it came from. the police are making enquiries now. the police are searching for the owner of the box because they have found a bomb in it. they hope they will arrest the person soon.

Answer 1

A box was left somebody on the  ...53 bus last night.
It was found by a woman under her seat.
It was given by her to the bus driver.
No one know where it came from. (без изменений)
Enquiries are being made by the police now.
The box is being searched by the police for the owner because a bomb has already been found in it by them.
They hope that the person will be arrested by them soon.

http://enjoyeng.ru/grammatika/passivnyj-zalog-v-anglijskom-yazyke-tablica