Помогите, пожалуйста
Раскройте скобки, используя  .Past Continuous или Past Simple
1. When I (to come) home, my little sister (to sleep).
2. I (to go) to the theatre yesterday.
3. At 7 o’clock yesterday I (to go) to the theatre.
4. What you (to do) at 5 o’clock yesterday. – I (to play) the piano.
5. When I (to come) to university, the students (to stand) near the lecture-room.