价值贡献相对较低的客户对服务的期望一般也比较低，如果提供更高的服务反而是一种“过度”。（）
参考答案：对
Where is it ________ you picked up this watch?
A．there
B．that
C．the place
D．which
Cynthia is not ashamed of what she does, even if she doing something wrong.
A．keeps up
B．puts up
C．ends up
D．stays up
