— I want to buy the book ‘The old Man And The sea’. Do you know its ?— Not very clearly M

问题补充：

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

— Not very clearly, Maybe fifty yuan.

A. cover

B. size

C. color

D. price

答案：

A. cover

B. size

C. color

(答案→)D. price

解析：根据句子意思和答语，可知答案为价格，故选D