1) I was walking to school when... 2) ____________ while I was playing basketball. 3) I was talking on my phone when... 4) She was swimming in the sea when... 5) _________ when I fell.  6) I was eating a burger when... 7) _____________ when I heard shouting.  8) _____________ while we were taking an exam.  9) __________ when it snowed. 10) _____________ when I saw a bear! 11) I became sick while... 12) While we were dancing.... 

Simple and past continuous (when/while)

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