题目内容：

A bag is useful and the word “bag” is useful, too. It gives us some interesting phrases（短语）.One is “to let the cat out of the bag" It is the same as “to tell the secret”.

There is an old interesting story about it. Long ago, when people sold things in big cloth（布）bags, a woman asked a man for a pig. The man held up his cloth bag. There seemed to be a little pig in it. The woman asked to see it. When the man opened the cloth bag, a big black cat ran out. Not a pig! The man's secret was out and everyone knew it. Now when someone lets out（泄漏）a secret, he "let the cat out of the bag". And that is the story where the interesting phrase came from.

1.The underlined word “it” in the passage refers to (指的是)     .

A. the useful bag              B. the phrase

C. the cat                     D. the chicken

2.The farmers put cats but not chickens in the bags to      when they sold chickens.

A. tell the secret            B. sell the cats

C. get more money             D. keep the cats quiet

3.Which is the best for the blank (空白处) in the passage?

A. The woman was angry to see a cat.

B. The man put a cat in the bag.

C. The man asked her to see the chicken.

D. The woman wanted to see the chicken.

4.The writer wrote the story to tell us     .

A. the woman was smart

B. how farmers sold their cats

C. the phrase is useful

D. where the phrase came from