While I _________ (walk) to school, I saw an old friend.
had walked
was walking
walked
By the time we arrived, the movie _________ (start).
was starting
had started
started
She _________ (already/eat) dinner before we invited her.
had already eaten
was already eating
already ate
He fell asleep while he _________ (watch) TV.
watched
had watched
was watching
I _________ (finish) my homework before my mom got home.
was finishing
finished
had finished
When he entered the room, everyone _________ (talk).
talked
was talking
had talked
I _________ (read) when my phone rang.
had read
read
was reading
They _________ (leave) before we arrived.
had left
left
were leaving
We _________ (arrive) at the airport two hours ago.
were arriving
arrived
had arrived
She _________ (finish) her homework and then watched TV.
finished
was finishing
had finished
I _________ (lose) my keys yesterday and couldn't get into my house.
had lost
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.
had explained
explained
was explaining
We _________ (have) dinner when the lights went out.
had
had had
were having
While they _________ (play) football, it started to rain.
played
had played
were playing
By the time she called, I _________ (already/go) to bed.
had already gone
was already going
already went
