The children talked so loudly at dinner table that I had to struggle ______.
A.to be heardB.to have heardC.hearingD.being heard在线课程A
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。