----Have you know Dr.Jackson for a long time?
----Yes,since she _____the Chinese Society.
A.has joined
B.joins
C.had joined
D.joined
答案是D为什么啊?
谢谢
问句为现在完成时,这时答语就得为这个时态创造条件。since 从句中用一般过去时,即从那时起(她加入汉语协会)到现在已经认识好长一段时间了。
再如:
I have seen (现在完成时) him many times since he came (一般过去时)here.