Choose the correct variant to complete the sentences. All the sentences are in the past perfect.

1. We could not send you a postcard because we ____________________ our address book.

• had forgeted
• had forgotten
• had forget

2. He went to Alaska where he ______________ before.

• had not been
• hadn't be
• not had been

3. When they came home, Sue ______________ dinner already.

• has been cooking
• had cooked
• is cooking

4. __________ breakfast before you came here?

• Had you had
• Had you have
• Have you had

5. She ____________ tennis before that day.

• had not played
• has not been playing
• has not played