单选题 The audience waited in ______ silence while their aged speaker searched among his note for the figures he could not remember.
A. respective B. respect C. respectful D. respectable

【正确答案】 C
【答案解析】respectful意为“尊敬的，恭敬的”；respective意为“各自的，分别的”；respect是名词，意为“尊敬”；respectable意为“可敬的”。