单项选择题
A. lasting for a short time B. not deep C. unimportant D. developing very slowly
A. They promote international trade. B. They allow very rapid money transfers. C. They are still limited to small transactions(交易). D. They are dependent on good telecommunications systems.
A. they owned the whole bridge B. they had the right to sell the hole C. they were able to mend the hole D. they could afford to mend the hole