问题补充：
—Have you worked here since you graduated?
—No, I at a factory in Beijing for six years.
A. would work
B. have worked
C. had worked
D. worked
答案：
A. would work
B. have worked
C. had worked
(答案→)D. worked
解析：。表示过去一段时间干过的事情，用一般过去时。句意为“自从你毕业就在这儿工作吗？不，我曾经在北京一家工厂工作过6年。”
