happy april fools' day!keep smile!

happy april fools' day!keep smile! April Fools'Day是什么意思 april fools day , 愚人节的英语是April Fool's Day还是April Fools' Day还是April fools Day 为什么用April Fool's day而不是April Fools’ day? April fool's day 还是 April fools' day 到底是April Fool's Day 还是April Fools'Day? april fools' day ____ on the first day of april. 愚人节 是April Fool's Day 还是April Fools' Day April Fools"Day is in( )月份 完形填空 April Fools' Day Marcia realized she ___on April Fools Day?