1) My uncle was listening to the radio _______ the earthquake happened. a) while b) when 2) The children were playing tennis ______ their grandmother called them for lunch. a) while b) when 3) I suddenly fell down ______ I was running away from the monster in my dream.  a) while b) when 4) Mary looked out of the window ________ it started raining. a) while b) when 5) The boys were playing football _________ the ball flew into the window. a) while b) when 6) Nelly was peeling potatoes _______ her sister was cutting chicken into pieces. a) while b) when 7) Rita was sleeping _______ the alarm clock rang. a) while b) when 8) They were driving towards the village _______ it started to snow. a) while b) when 9) She was answering emails ___ the phone rang. a) while b) when 10) He was washing a client’s hair ___ the water suddenly turned cold. a) while b) when 11) ___ the secretary was preparing the schedule, her computer froze. a) while b) when 12) A customer walked in ___ he was organizing the hair products. a) while b) when 13) ___ they were talking about the appointments, a walk-in client showed up. a) while b) when 14) She spilled her coffee ___ she was printing documents. a) while b) when 15) ___ he was styling a client’s hair, the power went out for a second. a) while b) when 16) The manager called ___ they were discussing a change in the weekly agenda. a) while b) when 17) ___ she was closing the cash register, someone knocked on the door. a) while b) when 18) She was talking to a supplier ___ a new order arrived in her inbox. a) while b) when 19) ___ he was sending an email, the internet stopped working for a moment. a) while b) when 20) She answered the phone ___ she was making a quotation for a new client. a) while b) when 21) ___ they were checking the monthly expenses, the system logged them out. a) while b) when 22) He was updating the client database ___ the secretary asked for help. a) while b) when 23) ___ she was reviewing the supplier contracts, her boss called a quick meeting. a) while b) when 24) He printed the wrong document ___ he was organizing the weekly schedule. a) while b) when 25) ___ she was preparing a quotation, a supplier sent updated prices. a) while b) when 26) The courier arrived ___ he was signing digital invoices. a) while b) when 27) ___ they were discussing a delayed delivery, the supplier finally replied. a) while b) when

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