单选题 He ______ in this company since he graduated from Andong Technical College ten years ago.
   A) worked                          B) had worked
   C) has been working                  D) was working
【正确答案】 C
【答案解析】自10年前毕业之后就在安东公司上班，动作发生在过去持续到现在，可能还要延续下去，故用现在完成进行时。