Does your son study at a junior high school or a senior high school?
你儿子是读初中还是高中？
There is a shortage of physics teachers at the junior college and high school level.
现在国内普通高中或大专院校都确实普遍缺物理教师。
At junior high school, I remember a friend helping me with a problem.
在中学时，我记得一个朋友曾经帮助我解决问题。
At junior high school, I remember a friend helping me with a problem.
在中学时，我记得一个朋友曾经帮助我解决问题。
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