Past simple or continuous

Gap-fill exercise
By Nacho Montorio

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
It was 2nd August, 2009, and my family and I (be) in Italy. we (decide) to visit Pompeii. While we (tour) the city, we (listen) to some explanations on our headsets. A boy's voice (start) telling us an incredible story. His story (get) my attention.
"I (sit) in the garden. My parents (say) "goodbye" before they (leave) the house. I (watch) the workers when suddenly, I (hear) a loud noise...".