Alex _____ in his office for 2 hours when his client phoned him.

We thought they _____ each other for many years.

He (already eat)  by the time we (arrive).

All the kitchen was covered with flour. My sister _____ a cake.

When I opened the door, I understood that somebody _____ in the room.

As soon as I saw her, she _____ waving me.

She was very nervous while she _____ for the doctor.

Jane said that she _____ her work yet.

I was angry with my roommate. He _____ the door open!