问题
选择题
My mother ________ as an architect since she graduated from Tongji University.
A．worked
B．has worked
C．had worked
D．is working
答案
答案：B
题目分析：句意：自从我的妈妈在同济大学毕业后她一直作为一个建筑师工作。动作从过去就发生了一直延续到现在，用现在完成时态，A过去时态，B现在完成时C过去完成时态D现在进行时态，根据句意，故选B。