at the beginning of the class ,the teacher asked us to sing a song.改错
问题描述：
at the beginning of the class ,the teacher asked us to sing a song.改错
答
好像没什么错，如果一定要说有的话，可能是因为at 在句首，要大写吧。
答
去掉theat the beginning of class ,the teacher asked us to sing a song. class 作“上课”讲时, 前面不用冠词再如：Class is over.He is now in class 如不明白请追问,如果满意请采纳手机提问者如果满意,请在客户...