单项选择题
A．Customers now rush to buy things on sale． B．Customers have got a sense of superiority． C．Customers have learned how to bargain． D．Customers have higher demands for service．
A．Recognition from colleagues should be given less importance． B．Workers are always willing and ready to learn more new skills． C．Psychological reward is more important than material one． D．Work will have to be made interesting to raise efficiency．