1. When we (arrived) at the theatre, the play had already begun. 2. We …(were) very pleased to see our grandparents again. We …(had not seen) them for four years. 3. When I …(came) to the station, the bus had already left. 4. My sister … (had done) her homework before she …(went) to the park. 5. My friend had already done his work when I …(phoned) him.1. When I came home my mum … dinner for us. a)Was cooking и c) had cooked 2. I am sorry I couldn't join you yesterday. I …for my exam. b)was preparing 3. What … he … before we arrived? a)Had done 4. The famous writer ….. in 1890. a)Was born 5) My niece … her homework before she went to the park. b) had done 6) My brother and my parents were very pleased to see my aunt again c) had not seen