Complete the sentences with the correct past simple or past continuous form of the verbs in brackets.
1 She (surf) when the shark (attack) her.
2 He (dance) at a party when he (meet) his girlfriend.
3 I (have) a picnic when I (see) my sister.
4 When they (see) the shark they (swim) in the sea.
5 Susan (arrive) while I (have) dinner.
6 He (play) football, when he (break) his leg.
7 I (wait) for my friend when the bus (arrive).
8 When I (get back) my mum (cook) dinner.