Though of danger, sightseers have been flocking to the site where the world’s biggest terrorist Bin Laden lived.
A. warned
B. warning
C. being warned
D. having warned
网友回答
A. warned
B. warning
C. being warned
D. having warned
解析：考查非谓语动词。句意：虽然被警告有危险，但观光者直涌向世界上最大的恐怖分子本·拉登居住的地方。前半句是“Though they are warned of danger”的省略形式sightseers与warn之间是被动关系。