Past Continous vs. Simple Past

A Golden Find
While divers were working worked( were working, worked ) off the coast of Florida, they discovered were discovering( discovered, were discovering ) a shipwreck containing gold worth $2 million. the divers were filming filmed( were filming, filmed ) a show about the coral reef when they found were finding( found, were finding ) the gold.

Four-legged Customers
One windy day, a woman was walking walked( was walking, walked ) her pet poodle down the street. A hairstylyst saw was seeing( saw, was seeing ) the dog through a window and noticed was noticing( noticed, was noticing ) its crazy hair! Later, while the sylist was creating created( was creating, created ) a new line of hair care products for dogs and cats, he came up was coming up( came up, was coming up ) with a new slogan: "Even animals have bad hair days!"

On the dance floor half a dozen couple were throwing threw( were throwing, threw ) themselves around. Most of them were dancing danced( were dancing, danced ) cheek to cheek, if dancing is the word. The men wore were wearing( wore, were wearing ) white tuxedos and the girls wore bright eyes, ruby lips, and tennis or golf muscles. One couple was not dancing didn't dance( was not dancing, didn't dance ) cheek to cheek. Mitchell's mouth was open, he was ginning ginned( was ginning, ginned ), his face was red and shiny, and his eyes had that glazed look. Betty was holding held( was holding, held ) her head as far as she could get away from him without breaking her neck. It was very obvious that she had had about all of Mr. Larry Mitchell that she could take.
A Mexican waiter in a short green jacket and white pants with a green stripe down the side came was coming( came, was coming ) up and I ordered was ordering( ordered, was ordering ) a double Gibson and asked was asking( asked, was asking ) if I could have a club sandwich.