Составьте во предложения 1. Polly has been studying medicine for a year. (How long…?) 2. We have known each other since last year. (How long…?) 3. Grace has been watering the flowers since 7 a.m. (What…?) 4. Jill has been reading her book in the garden. (Where…?) 5. My brother has always wanted to visit Greece. (What country…?)