Passive voicePomogite)))

380. A new plant was built outside the city. 
381. Meals are usually cooked by my mother in the kitchen. 
382. Homework is usually done by John before supper.
383. A book was given as a birthday present to me by my friends. 
384. Flowers will be bought by students for their favourite teacher. 
385. This translation must be done at once. 
386. The delegation will be met at the airport.
387. His letters are never answered by my sister.
388. Don't come in. The room is being cleaned. 
389. This work cannot be described in details.