求老师解答：书面表达 . 书面表达 . 老师这里有张没有名字的试卷,得了

Whose math paper is this?The mark is 100.It can't belong to average students.The handwriting is
very tidy and neat.Zhang Si does well in math.She may get a high mark.Because she works hard,Oh,
it can also belong to Li Ying.Yes,Li Ying is good at math,too.She got good grade every time,But she
is sometimes careless.Wang Yu is a top student.He is a little careless.He often forgets to write his name on the papers.It must be his paper.But his paper is here,whose paper might it be?
答案不唯一