单项选择题
A．She has been invited to give a talk. B．She is going to meet the man at 9:30. C．She cannot attend the presentation. D．She cannot work because of her toothache.
A．Customers’ questions could not be answered on the same day. B．Conflicts between them could not be properly solved. C．Customers often mistook one for the other. D．They had different business strategies.
A．At a road crossing. B．Near a school. C．Outside a police station. D．In front of a kindergarten.