Past continuous vs Past simple
Заранее спасибо​

1. They were watching TV when the earthquake happened.

2. The tsunami hit the coast yeasterday morning.

3. Mary used a bandage because she cut her leg.

4. The children were screaming when the lighting bolt struck a tree in their garden.

5. George burnt his hand while he was cooking lunch.

6. The group was skiing down the slope when an avalanche occurred.

7. Jenny was frying fish when she burnt her hand.