While I _________ (walk) to school, I saw an old friend.
was walking
walked
had walked
He fell asleep while he _________ (watch) TV.
watched
had watched
was watching
They _________ (never/be) to Paris before their honeymoon.
were never
never were
had never been
I _________ (finish) my homework before my mom got home.
had finished
finished
was finishing
When he entered the room, everyone _________ (talk).
talked
was talking
had talked
We were tired because we _________ (walk) all day.
walked
were walking
had walked
I _________ (read) when my phone rang.
was reading
had read
read
They _________ (leave) before we arrived.
had left
were leaving
left
We _________ (arrive) at the airport two hours ago.
arrived
were arriving
had arrived
She _________ (finish) her homework and then watched TV.
had finished
finished
was finishing
I _________ (lose) my keys yesterday and couldn't get into my house.
lost
had lost
was losing
They _________ (buy) a new car last weekend.
had bought
were buying
bought
The teacher _________ (explain) the lesson and then gave us some exercises.
explained
was explaining
had explained
We _________ (have) dinner when the lights went out.
had
were having
had had
While they _________ (play) football, it started to rain.
had played
were playing
played
By the time she called, I _________ (already/go) to bed.
was already going
already went
had already gone
