—You haven't been to the West Lake, have you?

—_____. But I will go there with my parents this summer vacation.  [ ]

A. No, I haven't    

B. No, I didn't      

C. Yes, I have          

D. yes, I did

要真正留住客户的方法是( )。

A．了解客户

B．关怀客户

C．奖励客户

D．提供一对一个性化服务