Do speak loudly while yourself understood well.
A. listen to
B. listening to to make
C. listened to to make
D. listening to be made
网友回答
A. listen to
B. listening to to make
(答案→)C. listened to to make
D. listening to be made
解析：考查状语从句的省略句和不定式做状语：句意：在有人听时，一定大声说话以便让你的意思被很好的理解。这是个状语从句的省略。完整的句子是 while you are listened to,这里为了避免重复，省略了和主句相同的主语you 和be动词 are，后面to make 在句中作目的状语，翻译成“为了…”选C。