While I _________ (walk) to school, I saw an old friend.
was walking
had walked
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.
was watching
had watched
watched
They _________ (never/be) to Paris before their honeymoon.
had never been
were never
never were
I _________ (finish) my homework before my mom got home.
had finished
was finishing
finished
When he entered the room, everyone _________ (talk).
had talked
was talking
talked
We were tired because we _________ (walk) all day.
had walked
were walking
walked
I _________ (read) when my phone rang.
was reading
had read
read
They _________ (leave) before we arrived.
left
were leaving
had left
We _________ (arrive) at the airport two hours ago.
were arriving
had arrived
arrived
She _________ (finish) her homework and then watched TV.
was finishing
finished
had finished
I _________ (lose) my keys yesterday and couldn't get into my house.
was losing
had lost
lost
They _________ (buy) a new car last weekend.
bought
had bought
were buying
The teacher _________ (explain) the lesson and then gave us some exercises.
explained
had explained
was explaining
She _________ (wait) for an hour before the bus came.
had waited
waited
was waiting
