1) Ines and Jeeyoun were surprised _____ they heard the news. a) WHILE b) WHEN 2) The movie started ________Irene was getting some popcorn. a) WHILE b) WHEN 3) Masayo clapped for the singers____________ they finished. a) WHILE b) WHEN 4) Michiko was sleeping _____ Nancy called her from the United States. a) WHILE b) WHEN 5) Mikako was eating at a restaurant _________ Faviola called her. a) WHILE b) WHEN 6) Norma and Sachi were walking home ______ they saw an accident. a) WHILE b) WHEN 7) Shizuka saw a beautiful lake ____ she was hiking with Youngjoo in the forest. a) WHILE b) WHEN 8) Eva and Jung Eun stayed inside ______ it was raining. a) WHILE b) WHEN 9) Masayo and Sachi saw dolphins ______ they were sailing on the ocean. a) WHILE b) WHEN 10) Youngjoo was making the cake ______ Ines arrived. a) WHILE b) WHEN

Use "when" before a simple past. Use "while" before a past continuous.

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