单选题 During the office hours, you should focus your mind on your work.
  • A. concentrate on
  • B. complete
  • C. remind
  • D. pay for


【正确答案】 A
【答案解析】focus on和concentrate on意思相同：集中(注意力等)；complete：完成、填写(表格)；remind：提醒、使想起；pay for：为某物付款。