Complete with the Past Simple or the Past Progressive of the verbs in brackets. 1. As soon as the children (hear) the spooky voice, they started screaming.

2. While I (get) on the bus, a pickpocket (steal) my wallet.

3. As the police (investigate) thе crime they (discover) that the security guard had done it.

4. The robber (run) out of the bank when the police (arrive).​