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
网友回答
A. sight
(答案→)B. track
C. touch
D. sign
解析：考查固定短语。句意：这个信息通过展示哪些商品正在出售和它们的流通速度来让商务人士及时跟踪了解商品清单。keep track of记录，跟踪，保持联系；相当于keep in touch with。故选B。