5 Complete the sentences with the correct form of the verbs in brackets. Then rewrite the sentences using while. 1. When the teacher arrived, they ... (throw) camera. paper. 2 I was sitting on a bus when I... (lose) my . 3 He... (try) to reach the biscuits when he fell. 4 My mum was holding the baby when he ... (smile) for the first time. 5 When I saw Rachel, she ... (pull) her suitcase.​