他在学校学习很努力，所以功课很好。翻译

Question

速度速度

Answer 1

He works hard at(要用at) school,so he is good at studying.
He works hard at school and his achievement is very good.

Answer 2

1.he works hard in school, so he is good at studying.
2.he is good at all his subjects because he works hard in school

Answer 3

His lesson is very good owing to his hard work at shool.

Answer 4

He works hand at school ,so he has good marks in studies.

Answer 5

He work very hard in the school, so he did good job in his homework.