Practice Simple Past vs Past Progressive

While I --walkedwas walking home, I --was seeingsaw a strange object in the sky.

She --was slippingslipped on the ice when she --was runningran to catch the bus.

They --atewere eating dinner when the power --went outwas going out .

He --was fallingfell asleep while he --watchedwas watching the movie.

We --were seeingsaw several deer while we --hikedwere hiking through the forest.

Mary --bakedwas baking cookies when John --was arrivingarrived .

While the teacher --explainedwas explaining the lesson, the students --listenedwere listening attentively.

The phone --rangwas ringing while she --was takingtook a bath.

They --dancedwere dancing when the song --was endingended .

I --was bumpingbumped into an old friend while I --shoppedwas shopping .