问题
选择题
The waters off the Diaoyu islands, first _____ in Ming Dynasty, are our traditional fishing area.
A．discovered
B．discovering
C．being discovered
D．having discovered
答案
答案：A
考查非谓语动词。逻辑主语the Diaoyu islands与discover之间为被动关系，故用过去分词，选A。