你班的Tom同学这学期与以前相比变化很大。请根据表格的提示内容写一篇短文，描述他的变化。字数80-100。要求：行文连贯，表达准确。

In the past	now
sleep or talk in class	listen to the teacher carefully
fight with other students	get on well with others
don’t do homework or do it badly	do home work well
…	…

How he has changed!
Tom is my classmate of mine. He has changed a lot in the last few years.