Put the verbs in past simple or past continuous.
1. I _ (watch) TV when my best friend _ (break) my glass. 2. He _ (see) her while she _ (visit) France. 3. When I _ (tidy) up my room, I _ (lose) my keys. 4. We _ (study) when our dog _ (eat) the cookies. 5. While they _ (drink) coffee, Celine _ (buy) a book. 6. Nino _ (make) a mistake while he _ (write) his homework. 7. Ana _ (go) to the restaurant when Darko _ (call) her. 8. The kids_ (do) homework when mum _ (go) out. 9. When we _ (enter) his house he _ (sleep). 10. James _ (shop) with his friend when a plane _ (fly) over their heads.