问题描述：
why not choose A
答案是D,告诉我为什么,还有翻译下,最好解释下里面含有的句子
i _____ in a chemical works for fourteen years,but now i am a librarian.
A have worked B had worked C have been working D worked
答案是D,告诉我为什么,还有翻译下,最好解释下里面含有的句子
i _____ in a chemical works for fourteen years,but now i am a librarian.
A have worked B had worked C have been working D worked
问题解答：
我来补答展开全文阅读