18. Когда мальчик вошел в комнату,

18. Когда мальчик вошел в комнату, его отец сидел у камина и читал письмо, которое он получил в его отсутствие.

19. На улице было еще светло, но в конторе уже горели лампы. Коростелев уже вернулся.

Результаты (английский) 1:

18. When the boy entered the room, his father sat by the fireplace and read a letter which he had received in his absence. 19. It was still light, but in Office has already burned lamp. Korostelev returned already.

Результаты (английский) 2:

18. When the boy came into the room, his father was sitting by the fireplace and read the letter, which he received in his absence.

19. The street was still light, but in the office were already burning lamp. Korostelev already returned.

Результаты (английский) 3:

18. when the boy entered the room, his father sat by the fire reading a letter he had received in his absence.19. the street was still light, but in the office already burning lamps. коростелев back already.