The Past Perfect Tense

Choose the right variant

He___ returned books to the library.

Choose the right variant

We ___ our friends before last Sunday.

She ___ this TV programme before her parents came home.

When Andy entered the room, his sister ___ the flowers.

They ___ their pills by seven o' clock yesterday.

Samanta ___ this monument before.

They ___ this article by the last lesson.

Mr.Tom ___ the tickets before.

___ his father ___ from his business trip by the weekend?

They___ ___ this key before.

The taxi ____ by 9 o'clock.