Ответ: Упр11.Jack has washed te dog.2. Father has cleaned his car.3.The boys have bought some sweets.Упр21. They haven’t painted their old house.2. She hasn’t broken a vase.3. We haven’t cleaned the room.Упр31. Has the train  arrived?2. Have you worked here for a long time?3. Has Kavin phoned his friend?Упр41. We have just phoned the doctor. 2. The train hasn’t arrived yet.3. The cat already has eaten up the fish. 4. Have you washed your hands yet? 5. We have just met an American actor. Упр51. I’ve lived in Moscow since1997.2. Ben has studied English for three years.3. They haven’t visited their grandparents  for months.4. Julie’s ill. She’s been in bed since Tuesday.5. We have moved to Oxford since I was ten.Упр6Dear Mum and Dad,I’ve lived in Africa for two weeks and I love it! Africa is beautiful! I haven’t travelled to any faraway place since last summer. I’m so happy now!I’ve already seen Mr. Rambler. He is working for WWF here and taking photos of wild animals. I haven’t seen any lions yet. I think I’ll see them later.Thank you for the trip. I’ve dreamed of Kenya since my childhood. I haven’t seen you for a long time! I miss you so much!Love, Nigel.