单选题 Mr. Jennings ______ his post at the state university to pursue a career in the private sector just three years ago.
  • (A) leaves
  • (B) is leaving
  • (C) left
  • (D) has left


【正确答案】 C
【答案解析】[语法] 过去时态
[错误答案] 已有明确的时间点three years ago，因此现在完成时(D)是错误答案。