The children talked so loudly at dinner table that I had to struggle A. to be heardB. to h

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(答案→)A. to be heard
B. to have heard
C. hearing
D. being heard
解析：句意，孩子们在饭桌旁说话太吵闹了，我努力使得自己被听到。struggle to do sth,意思是努力做某事 。“hear”和其逻辑主语“I”之间是被动关系，故用被动语态。