A little boy was attracted(吸引)by a board above the door of a shop. It read, "Little Dogs for Sale." A    16   like that has a way of attracting small children into the shop.
The little boy walked into the shop and found a dog behind other dogs and said, "What’s 17  with that little dog?"
The store owner said that the vet(兽医)   18  the little dog and found it was   19 . It would always be lame(破的).
The little boy became   20  ."That is the dog that I want to buy. "
The store owner said, "No, you don’t need to buy that little dog. If you really want him,
I’ll just give him to you. "
The little boy got quite sad. He said angrily, "I don’t want you to give him to me. I’ll 21    the full price for him. In fact, I’ll give you $ 2.37 now, and 50 cents a month   22 I have paid the full price. "
The store owner continued, "He is   23  going to be able to run and jump and play with you like the other dogs."
To his   24  ,the little boy rolled up(卷起)his trousers to show his badly hurt left leg. He looked at the store owner and    25   answered," Well, I don’t run so well myself and the little dog will need someone who understands him. "

 ---I want to buy the book Harry Potter. Do you know its _______?

--- Not very well. Maybe fifty yuan.

A. cover          B. size              C. color          D. price

— I want to buy the book ‘The old Man And The sea’. Do you know its_______  ?

— Not very clearly,  Maybe fifty yuan.

根据所给提示，完成句型转换。每空一词，含缩略词。

1. You have to give up smoking.  （改为否定句）

You ______ ______ to give up smoking.

2. I want to buy the knife on the left. （对划线部分提问）

_______ knife _______ you want to buy?

3. People cut down many trees in the past. （改为被动语态）

Many trees _______ _______ down in the past.

4. We all want to know when we will leave for Beijing. （改为简单句）

We all want to know ______ ______ leave for Beijing. 

5. 赶快，否则你会赶不上去北京的那趟火车了。（完成译句）

________ ________, or you will miss the train to Beijing.