Past Progressive or the Past Simple Tense of the verbs in margin.

1.     
We ... to a lecture yesterday at ten o'clock.                                                           listen
2.     
She ... the piano from 11 till 12 o'clock.                                                                 play
3.     
When he ... in, I ... my exercises.                                                                           come, do
4.     
What ... you yesterday at 8 o'clock?                                                                       do
5.     
Yesterday when I ... the newspaper, my sister ...

to a concert over the radio.                                                                       read,listen   
6.     
She ... out of the window when I ... her.                                                                 look,

1. We were listening to a lecture yesterday at  ten o'clock.                                                          2. She was playing the piano from 11 till 12 o'clock.                                                                 3. When he came in, I was doing my exercises.                                                             4.  What were you doing yesterday at 8 o'clock?                                                                       5. Yesterday when I was reading the newspaper, my sister was listening to a concert over the radio.                                                                           6.  She was looking out of the window when I saw her.