单项选择题
A．They would rather travel around than stay at home. B．They prefer to carry cash when traveling abroad. C．They usually carry many things around with them. D．They don’t like to spend much money on traveling.
A．offering sophisticated voice services B．giving access to emailing in real time C．helping clients discuss business at home D．providing calls completely free of charge
A．They look for reliable business-only providers. B．They contact providers located nearest to them. C． They carefully examine the contract. D．They contract the cheapest provider.