- 试题详情及答案解析
- --How long ________ as an assistant here?
-- Ever since I finished middle school.| A．are you working | B．did you work |
| C．have you been working | D．do you work |
- 答案：C
- 试题分析：考查时态。A.表示正在进行；B.表示过去；C.表示一直在持续；D.表示一般现在。句意：—你在这做助理多久了？—从我中学毕业就开始了。可知work动作一直在持续，从回答的since也可看出。故选C
考点：考查时态