a) When I was walking to the office yesterday, I met John.
b) It started to rain when we were playing in the garden.
c) When we were watching TV last night, Susan rang us and told us she was having a party at the same time.
d) I wanted to visit you last night, but you weren't at home. What were you doing at about 8 pm?
e) He recognized me, although I was wearing sunglasses.
f) When the schoolgirl was crossing the street, a bicycle hit and injured her.
