Helen had to shout .
A. making herself
B. to making herself hear
C. making herself heard
D. to make herself heard
网友回答
A. making herself
B. to making herself hear
C. making herself heard
(答案→)D. to make herself heard
解析：考查非谓语动词。句中不定式to make herself heard表示目的性。make+宾语+过去分词作宾语补足语,宾语往往是反身代词。选D。