【正确答案】正确答案： April Fool's Day 1st April is a day to be careful, / or you could easily get tricked by someone. / The origin of the day is connected with the change in the calendar in the 16th century, / which meant that 1st April was no longer the beginning of the year. / Those who still celebrated the New Year on 1st April were called fools. / On April Fool's Day, you could wear a black sweater / and pull a piece of white thread through it, / so that people try to pull it off. / You could change the time on someone's alarm clock / so that they're late for work. /