题目内容：

The students were reviewing their lessons when the teacher came in.(保持原句意思)
The students were ________ ________ their classroom when the teacher came in.说明为什么

优质解答

going over
go over = review 复习
保证准确率!\x0d不明白就追问!

追问：

��׼����went over,��Ҳдgoing over,��ʦ˵���