pupil的u和ruler的u发音不一样:[ju:]，[uː]
Can you measure accurately with this ruler?
用这把尺子能量得准吗?
He reminded me not to forget to bring my ruler.
他提醒我别忘了带尺子。
A teacher can't give individual attention to each pupil if his class is large.
如果班上的人数多，老师就不能给予个别辅导了。
The headmaster has made a decision of suspension of a pupilfrom school.
校长已经做出对一名学生停学处分的决定。
The singer was accompanied at the piano by his pupil.
演唱者由他的学生担任钢琴伴奏。
The painting is the work of a pupilof Rembrandt.
这幅画是伦勃朗的一位弟子的作品。
How many pupils are there in your class?
你的班里有多少名小学生？
英语尺子(ruler)中的u发的是长元音[uː] 。pupil中的u发[ju:]；
