Simple Past or Past Continuous?

 

1) He (hear) a noise while he (sleep) last night. He (get) out of his bed and (go) downstairs to find out what (happen) He (think) that it (be) a thief. While he (go) to turn on the light, someone else (turn) on it. And then he saw that it was his roommate.

2) A: "What you (buy) in that shop yesterday? I (see) you near the counter while I (pass) that shop." B: "I (not/buy) anything. I eee (talk) to my girlfriend who (begin) to work as an assistant in that shop.

3) She (be) very sorry that her brother (not take) her to the party.

4) While she (study) her lesson, her friends (enjoy) themselves there.

5) Selcuk (not/like) the film on TV and (turn) it off just as his parents (come) into his room to watch it. While he (go) out of his room, his father eee (turn) it on again.