单项选择题
A．He can use computers in his work. B．He can handle orders promptly. C．He can get timely information. D．He can improve his sales performance.
A．several studies have been done in the past few years B．not eating breakfast does no harm to one’s health C．adults have especially made studies in this field D．eating little in the morning may be good for health
A．among B．through C．between D．upon