V. Fill in the blanks with the words and expressions taken from the text. Caucasian Georgians, Hunzas and Vilcabambans all live till very old age. By(1)_______, people in industrial society (2)_______weak and ill in their 60s and 70s. The three groups (3)_______the secret of long life. First they began to do hard, (4)_______work since childhood and did not have (5)_______of retiring even though they were 80. They might (6)_______a bit but never(7)_______They live at very high (8)_______where the air has less oxygen.Another very important (9)_______is that these people are (10)_______pressures and worries of industrial society. (11)_______factors also (12)_______an important role. Finally (13)_______diets are also crucial to health. All these factors(14)_______the long life of these people. By. the way, the (15)_______approach to life is also necessary if one wants to live longer.