1) What were you doing _________ your parents came home yesterday? a) when b) while 2) The students were studying hard __________ the teacher suddenly announced a pop quiz! a) when b) while 3) My friends were playing volleyball _________ it started raining! a) when b) while 4) We were watching a horror movie ________ the power went out. a) when b) while 5) ___________ she was reading a book, her phone rang. a) when b) while 6) The doorbell rang ___________ we were eating dinner. a) when b) while 7) The kids were playing in the park _________ the sun was setting. a) when b) while 8) _________ he twisted his ankle he was jogging in the park. a) when b) while 9) The teacher walked in _________ the students were causing trouble.  a) when b) while 10) We were exploring the caves _________ the batters in our flashlight died. a) while b) when 11) A sudden knock at the door scared us __________ we were watching the horror movie. a) when b) while 12) We were swimming at the beach _________ the attacks happened. a) when b) while 13) I was taking a nap ________ my mother was making dinner. a) when b) while 14) We were taking the exam _________ the alarm went off. a) when b) while

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