Correct the mistakes with the past simple and past continuous.
1 When we looking for the lions at the zoo yesterday, we found the elephants.
2 Yesterday while I came back home, I dropped my purse in the road.
3 When I waiting for the bus, I saw a monkey in the trees.
4 When we walk beside the lake, we heard a noise behind us.
5 It is snowing when I went there and very cold.​