In April President Hu inspected the warships in Qingdao the 60th anniversary of t

问题补充：

In April, , 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

答案：

(答案→)A. marking

B. marked

C. having marked

D. being marked

解析：