Tom and Mary used to be primary school students in the same school. Mary used to hate examinations because examinations were difficult for her. Now Mary is not worried about the exam, and she is not as nervous as she used to be. Mary used to wear school uniform to school, and she didn't want to think about what to wear every day. It was a waste of time. Now the school allows her to wear whatever she likes. Tom is different from Mary, and the examination is simple to him. Tom used to play at school, but now he studies all the time. Tom also has some changes, such as he used to hate P.E. class, but now he likes P.E. class. Time changes things, doesn't it?
汤姆和玛丽过去是同一所学校的小学同学。玛丽过去讨厌考试，因为考试对她来说是困难的。现在玛丽不担心考试了，而且面对考试不像过去那样紧张。玛丽过去总是穿校服去上学，而且她也不想考虑每天要穿什么，这很浪费时间。现在学校允许她可以穿任何她喜欢的衣服。汤姆与玛丽不同，考试对他来说是简单的。汤姆过去放学时总在玩，但是现在他用所有时间学习。汤姆也有一些变化，比如他过去很讨厌上体育课，但是现在他喜欢上体育课。时间会改变一些事，不是吗？