“哪个年级”用英文怎么写

the junior class; a third-year student.
三年级；三年级的学生。
a secondary school usually including 7th and 8th grades.
通常包括七年级和八年级的中学。
A freshman; a plebe.
新生；一年级新生
He is in the third grade.
他读三年级。
Mary is in her freshman year.
玛丽大学一年级。
What grade are you in?
你上几年级?
A sixth-form pupil, lesson
中学六年级的学生、课
Lily is a Sophomore now.
莉莉现在大学二年级。
Mike is already a junior.
迈克已经大学三年级了。
She's in the fourth grade.
她是四年级生。