1) I was walking home ___ I saw my teacher. a) when b) while 2) I saw my teacher ___ I was walking home. a) while b) when 3) ___ I was sleeping, the alarm clock rang. a) when b) while 4) The alarm clock rang ___ I was sleeping. a) While b) When 5) He was reading a book ___ the phone rang. a) When b) While 6) The phone rang ___ he was reading a book. a) when b) while 7) I was riding my bike ___ I saw a dog in the road. a) when b) while 8) ___ we were having dinner, the electricity went off. a) when b) while 9) He was taking a shower ___ someone knocked on the door. a) when b) while 10) The teacher walked in ___ they were playing cards. a) while b) when

Past Simple Past Continuous: When/While

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