I used to love science class-all of them- 1. class改为classesbiology, chemistry, geography, physics. I think I 2. physics前加andliked those classes because I felt that it helped me 3. it改为they understand what the world works. For example, when 4. what改为how I was a child , the rain was a mystery. In one 5. ∨ class, I learn why it rained. I think science classes 6. learn改为learned clear up mysteries. But then there is always more 7. is改为aremysteries look into. What was my least favourite class? 8. look前加to That was maths. After learn the basics of the subject, 9. learn改为learning nothing else seemed very practically to me. I never 10. practically改为practicalsaw how I could use it in my daily life. 二、Dear Miss Zhang, Your letter comes to us from the USA only 1.comes改为cameyesterday. We read it with a great pleasure. I'm writing 2. 去掉ato you not only for myself but for the whole class. 3. ∨As you know it, I'm monitor of the class. 4. 去掉it I'd like, first of all, express our thanks to you 5. express 前加tofor you teaching. For the last two years, we have learning 6. learning 改为learneda lot from you. Thank to your help, we've made great 7. Thank 改为 Thanksprogresses in our English study. We are determined 8. progresses 改为progressto do still well in the future. We hope to hear from 9. well 改为betteryou as often as possibly. 10. possibly改为possible Good luck to you.原文中有个别拼写错误,我已根据文章意思做了改动,改后的文章保证百分百正确,请楼主放心。Good luck to you!