此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正：
此行多一个词：把多余的词用斜线（＼）划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
I used to love science class ---- all of them biology, chemistry, geography, physics. I think I liked those classes because I felt that it helped me understand what the world works. For example, when I was a child, the rain was a mystery. In one class, I learned it rained. I think science classes clear up memories. But then there is always more mysteries look into. What was my least favorite class? hat was maths! After learn the basics of the subject, nothing else seemed very practically to me. I never saw how I could use it in my daily life.