[9급 지방직 영어 2016년 17번]

Progress is gradually being made in the fight against cancer. ① In the early 1900s, few cancer patients had any hope of long-term survival. ② But because of advances in medical technology, progress has been made so that currently four in ten cancer patients survive. ③ It has been proven that smoking is a direct cause of lung cancer. ④ However, the battle has not yet been won. Although cures for some forms of cancer have been discovered, other forms of cancer are still increasing.