Relier Pairs matching BVersion en ligne matching when and while par Kristina Topalova 1 A boy fell over while... 2 The fire alarm rang while... 3 Joe was painting when... 4 We were waiting for the firefighters when... 5 Mr Carter took all our names while... we saw the smoke. we were standing outside. he heard it. he was running out of the building. I was doing a science experiment.
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