To celebrate his 45th birthday, Jack, a journalist,     1     (离开城市)and cycled along the small paths. The green grass，the bare rock, and the fresh air made him relaxed. Unluckily, he encountered a bear, and     2     (未能逃脱). He was pushed to the ground and bitten in the left leg.     3     (随后), Jack lost his consciousness. Hours later, Jack came to his life, surrounded by some loggers and a doctor.     4     (原来是他们救了他). Tears of gratitude rolled down his cheeks.