问题 选择题

—Have you known Dr. Jackson for a long time?

—Yes, since she        the Chinese Society.

A.has joined

B.joins

C.had joined

D.joined

答案

答案:D

句意:—你认识杰克逊博士很久了吗?—是的,自从她加入中国协会以来。显然,这是一个过去的动作,故要用一般过去时。

单项选择题
单项选择题