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?
汤姆和玛丽曾经是同一所学校的小学生。玛丽过去讨厌考试，因为考试对她来说很难。现在玛丽不担心考试，也不像以前那么紧张了。玛丽过去常常穿校服上学，她不想考虑每天穿什么。那是浪费时间。现在学校允许她穿任何她喜欢的衣服。汤姆和玛丽不同，考试对他来说很简单。汤姆以前在学校玩，但现在他一直在学习。汤姆也有一些变化，比如他以前讨厌体育课，但现在他喜欢体育课。时间改变了一切，不是吗？