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Task 5. Choose the correct answer (4 points).
She … TV when my sister came home after work. (watched/ was watching/ had watched)
Where … you … this book? (did … buy/was … buying/ had … bought)
I … my homework by 7 o’clock. (did/ was doing/ had done)
We … very pleased to see Alice again at the party last Sunday. (were/ were being/ had been)