Ответ:
1 Nick has been working as a doctor since 1985.
2 Peter has been living in Madrid since 2007.
3 The grandfather has been fishing for 6 hours.
4 Kathy has been playing the guitar since she was 11.
5 Mr. Horn has been writing his books for 20 years.
6 Jessica has been washing the windows for 4 hours.
Объяснение: