Past Simple or Past Continuous:
1) I (walk) to school, when I (meet) my friend.
2) Last summer my parents (stay) in a luxurious hotel.
3) Sasha (read) a book, while his sister (listen) to music.
4) The friends (play) soccer at 5 o clock yesterday.
5) Mary __ (not sleep), when her father ___ (come).

1) I _was walking_ (walk) to school when I _met_ (meet) my friend.

2) Last summer my parents _stayed_(stay) in a luxurious hotel.

3) Sasha _was reading_(read) a book, while his sister _was listening_ (listen) to music.

4) The friends _were playing_(play) soccer at 5 o clock yesterday.

5) Mary _wasn't sleeping_ (not sleep), when her father _came_ (come).