2 Sally was writing an email when her screen went blank.

3 Mum and Dad were watching TV when the power went off.

4 You were tidying your bedroom when I knocked on your door.

5 Sara was walking to school when it started to rain.

6 They were studying English when the fire alarm went off.

7 I was reading a book when I heard a loud noise.

8 It was getting dark when we arrived at the house.