Передайте следующие предложения в passive voice. william grove invented the first hydrogen fuel cell in 1839. shakespeare wrote “romeo and juliet”. she showed me the house which her son had built. 20. the postman will leave morning newspapers by the door.

The first hydrogen was invented by William Grove in 1839.
"Romeo and Juliet" was written by Shakespeare.
She showed me the house that had been built by her son.
20. Morning newspapers will be left by the postman by the door.