The underlined word" undue" (Par

A．Though a face-to-face meeting would cost much in traveling, it is more effective.
B．Many firms only deal impersonally with other firms in order to save money.
C．Good salesmen often bring notebooks along with them and note down the customers' opinions.
D．Key accounts and prospects are important to all companies.

A．exchange information about the business.
B．receive higher education.
C．travel around the world.
D．take the opportunities to stay together with their colleagues.