1) I was brushing my teeth ... my sister was making tea. a) when b) while 2) He was riding a horse ... the car drove to the stable. a) when b) while 3) Sue was walking along the path ... it started to rain. a) when b) while 4) You were washing the dishes ... I was drying them. a) when b) while 5) Kate was speaking to the doctor ... her mobile telephone rang. a) when b) while 6) We were discussing the film ... Mary was looking through some magazines. a) when b) while 7) The waiter was carrying the tray ... he dropped a glass. a) when b) while 8) Sam was crossing the road ... he saw his friend at the bus stop. a) when b) while 9) Lin and Wendy were preparing for the test ... the postman knocked at the door. a) when b) while 10) The child was eating soup ... his mother was making a salad. a) when b) while

when vs while

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