Yesterday, while I _ (walk) to school, I _ (see) a beautiful bird.
was walking, saw
While I _______________ (wait) for the bus, I met an old friend.
was waiting
She was cooking dinner when the fire alarm _______________ (go) off.
went
They _______________ (play) chess when the power suddenly went out.
were playing
She _ (read) a book when the phone _ (ring)
was reading, rang
They _ (play) football when it suddenly _ (start) to rain.
were playing, started
I _ (not/watch) TV when my mom _ (come) home.
wasn't watching, came
While we _ (have) dinner, the lights _ (go) out.
were having, went
He _ (fall) asleep while he _ (study).
fell, was studying
I _ (not/understand) what they _ (talk) about.
didn't understand, were talking
We _ (drive) to the beach when we _ (see) an accident
were driving, saw
While they _ (wait) for the bus, it _ (start) to snow
were waiting, started
I _ (find) a wallet while I _ (walk) in the park.
found, was walking
When the teacher _ (enter) the classroom, the students _ (talk).
entered, were talking
She _ (lose) her keys while she _ (run) in the park.
lost, was running
While I _______________ (exercise) regularly, I noticed significant improvements in my physique.
was exercising
