Bonsoir,
a. I met a friend while I was doing the shopping.
b. I was paying for my things when I heard someone call my name.
c. I turned round and saw Paula.
d. She was wearing a bright red coat.
e. We decided to have a cup of coffee.
f. While we were having a drink, a waiter dropped a pile of plates.
g. We all got a terrible shock.
h. While the waiter was picking up the broken plates, he cut his finger.
i. We left the café and said goodbye.
I would have said : we said goodbye and left the café ... not the other way round.
j. I finished my shopping and went home.
