Simple past vs past continuous

Front

Hello Anna, what _______ (you / do) when I called you last night?

Back

were you doing

Front

While they were watching TV, their kids ________(sleep)

Back

were sleeping

Front

I was listening to the radio when you ________(call) me.

Back

called

Front

When he opened the window, it __________ (snow).

Back

was snowing

Front

(she / go) ________out to dinner when you saw her?

Back

was she going

Front

Her plane didn't landed yet when we________ (arrive) at the airport.

Back

arrived

Front

She met them at the station while she _________ (wait) for her train.

Back

was waiting

Front

We use past continuous for:

Back

For an action that was happening during a time in the past

Front

How many people ___________(stand) in front of the company when she arrived?

Back

were standing

Front

She missed the bus because she __________ (argue) with one of her friends.

Back

was arguing