Put the verbs into the correct from ( past perfect continuous)1.We sleep for 12 hours when he woke us up.2.They wait

1. We had been sleeping for 12 hours when he woke us up. Мы спали 12 часов, когда он разбудил нас. 2. They had been waiting at the station for 90 minutes when the train finally arrived. Они ждали на станции в течение 90 минут, когда поезд наконец прибыл. 3. We had been looking for her ring for two hours and then we found it in the bathroom. Мы искали ее кольцо в течение двух часов, а затем мы нашли его в ванной. 4. I had not been walking for a long time, when it suddenly began to rain. Я не долго гуляла, когда вдруг начинал дождь. 5. How long had she been learning English before she went to London? Как долго она изучала английский язык, прежде чем отправилась в Лондон?