While I __________ (check) the production line, the machine suddenly __________ (stop)., was checking/ stopped, The team __________ (work) on the new process when the system __________ (fail)., was working/ failed, We __________ (have) a meeting when the manager __________ (call)., were having/ called, While they __________ (fix) the issue, another problem __________ (appear)., were fixing/ appeared, I __________ (not/pay) attention when the error __________ (happen)., wasn´t paying/ happened, While we __________ (try) to solve the problem, production __________ (slow down)., were trying/ slowed down, The operators __________ (work) normally when the alarm suddenly __________ (go off)., were working/ went off, While I __________ (train) a new employee, something unexpected __________ (happen)., was training/ happened, They __________ (not/work) on the machine when the problem __________ (start)., weren´t working/ started, While the team __________ (wait) for instructions, the manager __________ (make) a quick decision., was waiting/ made

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