This information allows businessmen to keep________ of their list of goods by sh

    题型： 单项选择题 难度： 一般
    This information allows businessmen to keep________ of their list of goods by showing which items
    are being sold and how fast they are moving.
    [????? ] A. sight??
    B. track
    C. touch??
    D. sign
    答案
    B