书面表达。
老师这里有张没有名字的试卷，得了100分，却没人认领，请帮助老师分析一下这张试卷是班里哪位同学的。
参考词汇：can't, must, might, do well in, be good at, average students, top students, hard working,
tidy, work, hard...
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