Usage Examples Past Simple vs. Past Continuous

• What were they doing when you arrived at the party? -
• I was studying at the library all day yesterday. -
• Where was your cousin born? -
• Lisa was studying when Joe called her. -
• We found the keys we were looking for yesterday. -
• What were you doing at eight o'clock last night? -
• Emma called me when I was sitting on the train. -
• I was standing in the line when I saw Mary. -
• Which shop did Tom go yesterday? -
• Who did you see at the train station? -
• Were they smiling when they saw you? -
• My mother bought a new bag yesterday. -
• Anna was sleeping when the burglars broke into her house. -
• We were playing tennis when Alex hurt his wrist. -
• Bob was waiting for me for two hours yesterday. -
• Who was Alessia talking to when you saw her? -
• While I was walking to the university, I witnessed an accident. -
• Susie was watching a film when she heard the noise. -
• You weren't dancing at noon yesterday. -
• Why was Lucy smoking at the party? -