In April,2009，President Hu inspected the warships in Qingdao， the 60th anniversary of the founding of the PLA Navy.
A. marking
B. marked
C. having marked
D. being marked
网友回答
(答案→)A. marking
B. marked
C. having marked
D. being marked
解析：考查非谓语动词。非谓语动词做状语，其后有宾语，故与逻辑主语是主动关系，且表示的动作与谓语动词的动作同时进行，用现在分词，选A。