Complete each sentence with the past simple or the past continuous form of the verb in brackets.

1. A huge tsunami _________ Japan in March 2011. (strike)

2. While the earthquake was happening, the walls in the house ________for what seemed like five whole minutes. (shake)

3. When the avalanche _________, Jimmy Chin ________ with two of his friends. (happen) (ski)

4. When Mt. Vesuvius _________, 20000 people ________. (erupt) (die)