单选题 Under-used computer equipment can proliferate in large companies without a system to monitor purchasing.
  • A. know
  • B. order
  • C. screen
  • D. watch


【正确答案】 D
【答案解析】monitor“监视”；know“知道、了解”；order“命令”；screen“屏幕”； watch“观察、察看”。