1) _______ I was walking to school, it started to rain. a) When b) while 2) She was watching TV _______ her mom called her for dinner. a) While b) When 3) _______ he was driving to work, he saw a beautiful rainbow. a) While b) when 4) I was doing my homework _______ my brother was playing video games. a) when b) while 5) _______ we arrived at the park, it began to snow. a) When b) while 6) My dad fixed the car _______ I was washing it. a) while b) when 7) _______ I was reading, my cat jumped onto my lap. a) While b) When 8) I met my best friend _______ we were in kindergarten. a) when b) While 9) _______ I was taking a shower, someone knocked on the door. a) When b) While 10) The teacher came in _______ we were talking. a) When b) while 11) _______ I saw her, I knew something was wrong. a) When b) While 12) I fell asleep _______ I was watching the movie. a) while b) when 13) _______ I opened the box, I found a surprise inside. a) When b) While 14) She was listening to music _______ she was doing her homework. a) when b) while 15) I was cooking dinner _______ the phone rang. a) while b) when

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