+, It was studying at eight o’clock., She was filming the music video at eight o’clock., He was listening to music ten minutes ago., You were talking on the phone at four o’clock., We were taking a photo at seven o’clock, They were using a blender at nine o’clock., -, It wasn't studying at eight o’clock., She wasn't filming the music video at eight o’clock., They weren't using a blender at nine o’clock., We weren't taking a photo at seven o’clock, ?, Were they filming the music video?, Was Adrianna listening to music at four o’clock?, S?, What was Adrianna doing at four o’clock?, Where were they filming the music video?.

4.2

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