在高一時，我擔任了班上的服務股長及參加了學校的衛生服務隊並擔任儲備幹部

在高一時，我擔任了班上的服務股長及參加了學校的衛生服務隊並擔任儲備幹部，

結果 (英文) 1:

In the first year of high school, I served as the head of the class's service unit and participated in the school's health service team and as a reserve cadre.

結果 (英文) 2:

In my senior year, I served as the head of the service unit in my class and as a member of the school's health service team and as a reserve cadre.

結果 (英文) 3:

In the first year of senior high school, I served as the head of the service unit of the class, participated in the school's health service team and served as a reserve cadre,