跟踪,监测,追踪 v.   t______

生产率,生产力 n.    P______

有效率的,高效能的 adj.   e______

买,购买 v.   p______

趋势,趋向 n.   t______

私有的,私人的 adj.   p______

服务 n.   s______

We are looking for a new manager. Good business skills in staff recruitment, management negotiation, marketing and management are ______(require).

In most circumstances e-business ______(refer)exclusively to Intemet businesses.

Many large-and small-scale online grocer ventures have ______(fail) or continue to lose money these months.