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

when or while

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