While he ............, his father arrived., came, was sleeping, called, She was cooking when her friend .............. ., was playing, was driving, came, When I saw him , he ............. ., called, was playing, came, What were you doing when I ....................you?, was playing, was sleeping, called, They were watching TV , when the lights .............. off., went, came, was sleeping, While I ................ my car, I crashed into a tree., came, went, was driving.

while- when

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