Use verbs in past simple and past continuous tense.
1)I (not to work) when you came in
2) When Alice (to return),I (to listen) to the radio
3)He (to wash) his face when somebody (to knock) at the door
4)Pete (to water) flowers in the garden 2 years ago
5)She (to swim) yesterday
6)She (to read) from two till four yesterday
7) I (not to write) at five o'clock last week
8)When the phone (to ring),I (to have) dinner