单选题 Microcomputer proves itself more and more important in the business, so additional machines are purchased.
  • A. lent
  • B. bought
  • C. borrowed
  • D. repaired


【正确答案】 B
【答案解析】purchase“购买”；lend“借出”；borrow“借来”；repair“修理、修补”，bought为buy的过去时。