(急!!!)請將以下句子翻譯成英文

1:我會盡我最大的努力學好英文.
2,我認為香港的污染很嚴重,我希望用我的知識去改善他們.
3,幾年之後,我會回大學修讀碩士課程.
4,我比其他同學大2年,因為我7嵗開始讀小學.

譯文：

1: I will try my biggest efforts best to learn English well.
2,I think the pollution of Hong Kong very serious, I hope to improve them with my knowledge.
3,A few years later, I will go back to the university to major in course of pursuing the master degree.
4,Old 2 years than other classmates for me, because I begin to study in the primary school at 7 years old.

1. I will try my best to learn English.
2. I think pollution is very serious in Hong Kong. I hope I can use my knowledge to improve the situation.
3. Several years later, I will return to the university and finish the master course.
4. I am two years older than the other classmates because I began my primary education at seven.

1.I will try my best to learn English well.
2.I think the pollution in Hong Kong is very grave,I hope I can improve it with my knowledge.
3.I will go to a college to have my master courses years later.
4.I am older than other classmates two years because I began to study at primary school seven years old.

1.I will try my very best to learn better english.
2.I think Hong Kong's air pollution is really serious, I hope I can use me knowledge to modify them.
3.Several years later, I will return to the university to study master the curriculum.{check in the internet}
4.I am 2 years older then the other students because I studied in primary school since I am 7 years old.

1. I would do my best to learn English
2. I think that the pollution problem of Hong Kong is very serious.
I hope I can use my knowledge on improving the problem.
3. After a few years, I will back to the university and futher my master's degree.
4. I am older than other classmates because I start going to primary school at seven.