4. Use conjunctions to complete the following paragraph. WHY WOMEN LIVE LONGER
Some British scientists now believe that women live longer than men a) . . . . . . . . . . . . . . . T cells, a vital
part of the immune system that protects the body from diseases. Previously, various theories have attempted to explain longer female life expectancy. Biologists claimed that women lived longer b) . . . . . . . . . . . . . . . . . . they need to bring up children. Others argued that men take more risks, c) . . . . . . . . . . . . . . . . . . . . . they die earlier. But a team from Imperial College think that the difference may be d) . . . . . . . . . . . . . . . . . . . women having better immune systems. Having studied a group of men and women they found that the body produces fewer T cells as it gets older, e) . . . . . . . . . . . . . . . the ageing process. However, they admit that this may not be the only factor, and f) . . . . . . . . . . . . . . . . . . . another research project may be conducted.