The bag is one of the most simple and useful things in the world. It is a container made of paper or

The bag is one of the most simple and useful things in the world. It is a container made of paper or
Another widely-used expression is to let the cat out of the bag. It is used when someone tells something that was supposed to be secret. No one can explain how the cat got into the bag. But there is an old story about it.
Long ago tradesmen sold things in large cloth bags. One day a woman asked for a pig. The tradesman held up a cloth bag with something moving inside it. He said it was a live pig. The woman asked to see it. When the dishonest tradesman opened the bag, out jumped a cat – not a pig. The tradesman's secret was out. He was trying to trick her. And now everybody knew it.在线翻译,快!
The phrase to be left holding the bag is as widely used as the expression to let the cat out of the bag.
The bag is one of the most simple and useful things in the world. It is a container made of paper or cloth. It has given the world many strange expressions that are not very simple. Some of them are used in the United States today.
这是第一自然段