While I ______ home, I suddenly ______ an old friend., a) walked / was seeing, b) was walking / saw, She ______ dinner when the electricity ______ off., a) cooked / was going, b) was cooking / went, While we ______ for the bus, it ______ to rain., b) were waiting / started, c) were waiting / was starting, I ______ my phone while I ______ across the street., a) dropped / was walking, b) was dropping / walked, When the teacher ______ into the classroom, the students ______ loudly., a) was coming / talked, b) came / were talking, While Sara ______, her brother ______ TV in the living room., a) studied / watched, b) was studying / was watching, They ______ football when one of the players ______ and hurt his leg., a) played / was falling, b) were playing / fell, While I ______ at the café, someone ______ my name., a) was sitting / called, b) sat / was calling, He ______ to music when his mother ______ him to help her., a) listened / asked, b) was listening / asked, ______ I was driving to work, I saw an accident., a) When, b) While

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