1) I (was sitting) in a cafe when you (called)
2) When you (arrived) at the party, who (was) there?
3) Susie (was watching) a film when she (heard) the noise.
4) Yesterday I (went) to the library, next I (had) a swim, later I (met) Julie for coffee.
5) We (were playing) tennis when John (hurt) his ankle.
6) What (were they doing) at 10pm last night - it was really noisy?
7) He (was taking) a shower when the telephone (rang).
8) He (was) in the shower when the telephone (rang).
9) When I (walked) into the room, everyone (was working).