The customer wants to book a flight from Beijing to Shanghai. The agent should ask：

The customer wants to book a flight from Beijing to Shanghai. The agent should ask：
A.When do you want to fly？
B.Why do you want to go to Shanghai？
C.How many people are there in your family？
D.Do you like flying？
正确答案：A
试题解析：客户表示要预订从北京到上海的航班后，询问出行时间是确定航班的关键信息，其他选项的问题与预订航班的核心信息无关。