1) ... he was surfing the internet, his computer crashed. a) when b) while 2) I was waiting for Ben ... I saw Kelly. a) when b) while 3) I fell asleep ... I was working. a) when b) while 4) ... we were having dinner, Dominic phoned. a) when b) while 5) Liz was reading a magazine ... the light went out. a) when b) while 6) I was looking for my keys ... I found your pen. a) when b) while

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