I was dancing ballet when....., I was sleeping while..., They were drinking water while...., She was playing games when...., I finished the activity while...., They were practicing when...., She was feeling happy when...., My sister was feeling sad while...., Jack ate my food while...., Nina played in the computer while..., The children were feeling sick when...., The teacher was talking when...., I got a figer cut while....

[2] WHEN / WHILE

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