高二英语短文改错,座等!

高二英语短文改错,座等!
此题要求改正说给短文中的错误.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）,请找出错误并加以改正.
①Mr.Huang is sixty years old.He has retired.He taught our ②Chemistry when we were in Senior Grade One.He was old,and ③he taught very well.He tried his best to make his classes live.Mr.④Huang usually made good preparations for the lessons and was ⑤strict in us too.Each time we made mistakes in our homework,⑥he would ask us correct them.At one time,I was rather poor in ⑦chemistry.Mr.Huang often helps me with my study very ⑧patiently.With his help,I made a great progress and caught ⑨us with the class.He wasn't always very kind to every student.As ⑩an experiencing teacher,he was respected and loved by all the students.

保证准确!
1.our→us
2.and→but
3.live→lively
4.去掉the
5.第一个in→with
6.ask和us中间加入to
7.helps→helped
8.去掉a
9.wasn't→was（us肯定是up误打）
10.experiencing→experienced

这个解释是对的