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This dress has been designed by Calvin Klein.
A new bridge is being built by them.
A pink sweater will be knitted for me by my mother.
An invitatation was sent to James by Karen.
Where was the car parked by them?
Whom was written the music for Cats by? или By whom was written the music for Cats?
When I arrived the flat was being painted by them.
Before the lights went off the meal had been cooked by them
Many famous operas were composed by Puccini.
The cake was decorated with flowers and chocolate pearls by them.

1) this dress has been designed by Calvin Klein
2) a new bridge is being built by them
3)a pink sweater will be knited for me by My mother
4) James was sent an invitation from/by karen. or an invitation was sent to james from/by karen.
5) Where did the car was parked by them?
6) Whom the music was written for Cats?
7) my flat had being painted by them when i arrived.
8)the meal had been cooked by them before the lights went off.
9) many famous operas were composed by Puccini
10) the cake was decorated with flowers and chocolate pearls by them