On formal _______, people pay more attention to manners.

On formal _______, people pay more attention to manners.
A、situations
B、cases
C、conditions
D、occasions
【正确答案】：D
【题目解析】：situations 状况；cases 案例；conditions 条件；occasions 场合；句意：在正式______，人们更注重礼节。D符合题意，正式场合。