4. Complete the sentences with when or while. 1) Ron was watching TV ... his neighbour rang the doorbell. 2) ... Jessica was typing a report, Henry was surfing the Net in search of some information for the History project. 3) Roger was having a cup of coffee ... his wife was drying her hair. 4) ... the rescue brigade found the injured man, he was lying unconscious on the ground. 5) ... Monica was sunbathing, Mick and Tom were playing beach volleyball with some other boys. 6) Mr Stevens was looking through some documents ... the light in the office suddenly went out, 7) ... I was vacuuming the carpet in the living room, my sister was dusting the furniture in the bedrooms. 8) The travellers were walking through the wood ... they heard a loud rumble of thunder.