Англ. язык, Passive Voice, пж помогите

Дети, когда вы начнете давать хоть пару своих вариантов?) Ну и делить на 2-3 вопроса такого размера опусы)

1) The room was cleaned and aired last Friday. Whom were these letters written by?
2) The letter was typed a year ago. All the questions have been answered today
3)The door was opened. Betty was met at the station. The girl is not allowed to go to the concert today
4) The Roast chicken was being eaten with appetite when I came in
5)it was so dark, that the house wasn't seen
6)The light is/was turned off in the morning
7)The boy was punished for misbehaving two days ago
8)At three o clock in the afternoon everything was prepared
9) The dictation will be written without mistakes in 2 days
10) Her dress will be washed and ironed next morning
11)I was not blamed for the mistakes yesterday
12) The papers will be looked through and corrected at the next lesson
13)This house was built last year
14) The letter will be sent the day after tomorrow
15) This article has been translated at this lesson
16) When will this book be returned to the library?
When was this book returned...?

В энном количесвте предложений недостаточно данных для однозначного выбора времени.