Verified answer

1/ Who was looking through the magazine when you came into the library? Кто просматривал журнал, когда ты вошла в библиотеку?

2) Were both Nelly's brother were giving her a lot of advce while she was cooking  some traditional Japanese  dish?  Оба Неллиных брата давали ей советы в то время, как она готовила национальное японское блюдо?           

3) She used a lot of examples while she was explaining a new rule to her class.  Она использовала много примеров, пока объясняла новое правило своему классу.     

4) Yesterday I was very busy. At 12 I  was writing my English exercises, at 4 I was having my music class and at 6.30 I was learning to work on the computer.Вчера я был очень занят. В 12 я писал мои английские упражнения, в 4 у меня был урок в музыкальной школе, и в 6.30 я учился работать на компьютере.               

5) She could not understand what he was talking about. Она не понимала, о чем он говорил.                     

6) The weather was fine and  a lot of people were swimming in the river. Погода была хорошая, и многие люди купались в реке.

1)was looking, came

2) were giving, was cooking 

3)used, was explaining

4)was,was writing, was having ,was learning

5)could, was talking 

6)was, were swimming

Думаю так ..............................................................