1 At 9 pm last night I was reading a novel.
2 Which CD were you listening to?
3 He was writing a letter, it was an email.
4 Were you sleeping at 2 am?
5 I was tidying my room at 8.15 this morning.
6 They were waiting for the bus, it was a taxi.
7 Which chair were you sitting in?
8 My baby brother was crying because he was very tired.
Ответ: смотри решение выше