他过去学习不努力。当老师上课时,他假装在认真听讲。(used to,when)_______________________________________________________________________________
she, a dream, has (她有一个梦想.)
they, are, working (他们在工作.)
the room, is, small (房间很小.)
It is hard for a (西方人) to imagine such great achievements made in China.
Boys and girls, please stand in a (直的) line.