During Grade 12, the principal, academic advisors, and all the teachers.

在12 年级，校长，学术顾问和其他教。

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Today I am very glad to be here and represent Grade 12 students to give you a speech.

今天我非常荣幸，代表12年级的同学在这里为大家做一个演讲。

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Teda International School's secondary program begins with grade 7 and ends with grade 12.

泰达国际学校的二级计划从7年级开始，到12年级。

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It also says the drinks shouldn't be sold or marketed in schools through grade 12.

WSJ: Monster Beverage Under Fire, Sued by San Francisco

By grade 12, U.S. students were performing below the international average in both subjects and were among the lowest of the 21 countries, mostly industrialized, that tested students at this grade level.

UNESCO: II Part Analytic Section

Every year through to Grade 12, we sit three exams at the end of each term for every single subject, and the final term exam we have to pass (and pass it well), or we fail and we would have to repeat the year, while some of our friends move on.

BBC: Exam overload: Are you getting stressed out?