It is ten years since my aunt worked here.为什么整句话表示的是aunt已不在这里工作了?

自从aunt在这里工作到现在已经十年了,你的问题问错了.It is ten years 表明还在这里工作.since my aunt worked here,worked表示自从过去开始到现在.---It is ten years since my aunt worked here.---_____?A.Has she worked here happilyB.How long will she still work here C.Where does she work nowD.Does she want to make a change now答案选c 解析是since后用过去式worked可知，aunt现在已经不在这里工作了。现在完成时有两重意思：1，还在延续；2，已经停止。如：i have studied here for 2 years.可以表示还继续读下去，也可以已经停止不再读下去了。你的问题是：已经停止。所以选C。那我选d不行吗？表示她还在延续。。完全可以