Each of the 400 people received from their boss____ gift——“Who moved my cheese?”——____ best-seller in the US——to understand how to deal with changes in their lives and work.

A．the; 不填

B．a；a

C．a；不填

D．the；a

科目 英语   题型 单选题   难度 容易

知识点： 冠词的用法辨析