为一篇英文短文添加适当的标点符号和大写字母，使其更易读。
The life of a caterpillar is not an easy one it must hide from predators until it reaches its final stage of metamorphosis during which it becomes a butterfly before it can fly it must also dry its wings in the sun.
The life of a caterpillar is not an easy one. It must hide from predators until it reaches its final stage of metamorphosis, during which it becomes a butterfly. Before it can fly, it must also dry its wings in the sun.