The crowd stood in _____ silence as the funeral procession went by.

A. respectful

B. respectable

C. serious

D. sincere

A【解析】句意：人们恭敬而又肃穆地静立着，目送葬礼队伍通过。respectful指感到或表现出尊敬，respectable表示举止行为值得尊敬的或体面的。其余两个相差很远。