【题目】I appreciate ____ the opportunity to study abroad two years ago.
A.having given
B.having been given
C.to have been given
D.to have given

【答案】B
【解析】句意：我很感激两年前有出国学习的机会。appreciate后加动词-ing形式作宾语，根据two years ago可知动作已经发生且opportunity和动词give是被动关系，故用完成时的被动。故选B.