Circle the correct words 1 Grandma was cooking when the doorbell rang/ was ringing / were ringing. 2 When I did/was doing)/ were doing my homework, my mum called me. 3 The builder was working when his boss (arrived)/(was arriving/ were arriving. 4 When we were coming / was coming/came in, the receptionist was having lunch. 5 We was saying / said were saying goodbye when the train left the station. 6 When I was buying her book, I saw / see / was seeing the author.