Ⅳ. 根据视频截图及解说词，完成下列各题。
He sweeps the floor(扫地). She (1)c the (2)b. They work together to make the classroom beautiful.

He hands out(分发) workbooks. She (3)s the eraser with her classmate. They help teachers and each other.

1. 根据视频截图内容和首字母提示，填写单词补全解说词。
2. 若下图是你拍的一段视频，请你给视频补充解说词。

1. (1)cleans (2)blackboard (3)shares
2. puts back the desks and chairs