All the chilldren work hard at还是work hard on our lessons
All the chilldren work hard at还是work hard on our lessons
our teachers always ____ us work hard at our lessons
是work hard at sth.还是work hard on sth.
work hard on和work hard at
work hard in还是work hard at?
she didn't work hard at her lessons so she failed ()all the
the student work hard at their lessons.的意思
work hard at hard
是they work all hard还是they all work hard
work hard at和work hard on 的区别
The workers____very hard.A.all work B.are all at work C.work
we work hard at our lessons when we are at school什么意思?