Past Simple vs Past Continuous

Complete the text below with the appropriate tenses (Past Simple / Past Continuous).

1. He (walk) into the bar, (sit) next to her and (order) something to drink.
2. While I (lie) on the beach, I (hear) some strange noise.
3. Jim (study) for his test while Ann (listen) to the radio.
4. What (you/do) when the police (arrive)?
5. I (wash) the dishes, (clean) the floor and (cook) dinner.
6. When I (get) to work, Fred (work) on his project and Mary (talk) to a customer.