China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from in the South China Sea.
A. attacking
B. having attacked
C. being attacked
D. having been attacked
网友回答
A. attacking
B. having attacked
C. being attacked
D. having been attacked
解析：prevent sb from doing sth“阻止某人做某事”，本句中的fishing boats和attack是被动关系，所以选择C项，句意：中国最近加紧黄岩岛的水域控制来阻止中国渔船在中国南海被袭击。