1) We were cleaning up the beach ........ we found the plastic bags a) when b) while 2) Mary met her aunt, ......... she was waiting for the bus. a) when b) while 3) .... I looked out of the window, it was raining. a) When b) While 4) Nobody was waiting for the bus, ...... I arrived a) while b) when 5) ...... Peter was waiting for the bus, his mum called him. a) when b) while 6) I ........ video games at 5 o'clock yesterday. a) played b) was playing 7) When I ....... the house, I took my coat because it was raining. a) left b) was leaving 8) The telephone ....... while I was cooking lunch. a) rang b) was ringing 9) The cat brought in a mouse, ....... I was having breakfast. a) when b) while 10) She was working in Tokyo, ...... she got married. a) when b) while

when / while B class

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