Используйте past simple/ past continuous tenses i (meet) a friend while i (do) the shopping. while i (pay) for my things, i (hear) someone call my name. i (turn round) and (see) paula. she (wear) bright red coat. we (decide) to have a cup of coffee. while we (have) a drink, a waiter (drop) pile of plates. we all (get) a terrible shock. while the waiter (pick up) the broken plates, he (cut) his finger. we (leave) the cafe and (say) goodbye. i (finish) my shopping and (go) home.

I met a friend I was doing the shopping.
While I was paying for my things, I heard someone call my name.
I turned round and saw Paula. She was wearing a bright red coat. We decided to have a cup of coffee. While we were having a drink, a waiter dropped pile of plates. We all got a terrible shock. While the waiter was picking the broke plates, he cut his finger. We left the cafe and said goodbye. I finished my shopping and went home.