-Is your mother a doctor in Qilu Clinic? –No!But she there for ten years.A. workedB. has b

问题补充：

-Is your mother a doctor in Qilu Clinic? –No!But she there for ten years.

A. worked

B. has been working

C. has worked

D. had worked

答案：

(答案→)A. worked

B. has been working

C. has worked

D. had worked

解析：考察时态。本题特别容易错选C项。现在完成时表示过去发生的事情持续到现在，或者表示过去发生的事情对现在的影响。而本题这两种意思都没有体现。句义：—你妈妈是齐鲁诊所的医生吗？—不是。但是她曾经在那里工作了。根据句义可知只是陈述我妈妈过去曾经在那里工作过，故使用一般过去时即可。故A正确。