Помогите с английским плизз,нужно раскрыть скобки )

Past Tenses
1. It (to be) cold yesterday.
2. Yesterday at 4 p.m. she (to work) in the garden.
3. I (to see) his brother the day before yesterday.
4. He (to play) the piano for an hour before we came.
5. We (not to watch) TV last week. 6. They (to sit) in the room when she walked in.
7. He (to live) in Moscow 10 years ago.
8. We (to walk) for two hours when we saw a house.
9. My parents (to sell) the old cat before they (to buy) a new one.
10. By six o'clock Mum (to make) a cake.
11. They (to do) hw yesterday while she (to sleep).
12. My sister (to go) to England two months ago. Before she (to buy) a ticket she (to reserve) a room in the hotel. She (to have) a great time there. She (to visit) a lot of places of interest. When the weather (to be) rainy Olga (to watch) TV or (to read). She (to live) there for 2 weeks. But she (not can) visit Stonehenge.

1.it was2.was working3.saw4.had been playing5.didn't watch..6.were sitting7.lived8.had walked(илиhad been walking)9.had sold..bought10.had made11.were doing..was sleeping12.went..bought...had reserved..had..visited..was..was watching..or reading..lived..couldn't