The maker of the popular game Angry Birds announced on Tuesday that it would open its first overseas operation in Shanghai, a clear step to further enter the booming Chinese market.
A. to mark
B. marking
C. marked
D. having marked
网友回答
A. to mark
(答案→)B. marking
C. marked
D. having marked
解析：考察分词作状语用法。现在分词作结果状语表示意料之中的结果。句意：疯狂的小鸟的游戏商宣布将在上海建立第一家海外机构，标志着其进一步进入中国市场。