Раскрыть скобки.Past Continuous. What..........(happen)at

Раскрыть скобки.Past Continuous. What..........(happen)at the time of the robbery? Weel,I..............(sit)in my office,I..............(talk)to an employee,Some of the staff.........(put)food onto the shelves.Several customers.........(do)their shopping and a cashier.................(stand)behind the till. Can you tell me anything about the robbers ? Yes, They..........(wear)black masks and they..........(hold)guns.They...............(shout). How did they get away? They drove off in a car which.....................(wait)outside/