1) _________ I was playing, my mother called me. a) while b) when 2) Sarah broke her arm ______ she was riding her bike. a) while b) when 3) _________ I was driving to school, I saw an accident. a) while b) when 4) I was playing _______ my mother was cooking. a) while b) when 5) He was listening to music _____ he was reading. a) while b) when 6) The kids arrived _____ I was having a bath. a) while b) when 7) I was ready to go to bed ______ Sue arrived. a) while b) when 8) _________ she arrived, it was almost midnight. a) while b) when 9) It was snowing _______ I woke up. a) while b) when 10) _____ she was dancing, I was working. a) while b) when 11) _____ Daisy called me, I was cooking. a) while b) when 12) ______ the teacher came into the classroom, some students were fighting.  a) while b) when 13) ______ she was a little girl , she visited her grandparents with her mom. a) while b) when

when or while

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