1, When I arrived , Jack had left the office.
2, While I was having lunch, someone rang the bell.
3, After Kate had taken two aspirins, she felt a lot better.
4, When we were having dinner, there was a knock at the door.
5, By the age of 35, Mozart had written more than 600 pieces of music.
6, The last time Nancy came here was 1990.
7, Sue went to Italyfor the last three weeks.
8, It's over a year since we havegone to the cinema.
9, He hurt his leg when he played football.
10, David has played tennis since he was young.