海洋神话号票价:这个题怎么做,为什么?

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/17 14:06:12
31. The old man, ____________abroad for twenty years, is on
the way back to his motherland.

A. to work B. working C. to have worked
D. having worked

D 这个已经在海外工作了20年的老家伙,正在返回祖国的路上