The children talked so loudly at dinner table that I had to struggle .
A. to be heard
B. to have heard
C. hearing
D. being heard
网友回答
(答案→)A. to be heard
B. to have heard
C. hearing
D. being heard
解析： 考查非谓语动词。Struggle to do sth.努力做某事，所以排除C,D；且主语I和hear之间是动宾关系，所以要用不定式的被动形式。选A。