新标准小学英语第四册（一年级起点外研版）Module 3

新标准小学英语第四册（一年级起点外研版）Module 3

Unit¹ 1 Sam isn't tidying his room.

Unit 2 Are you doing your homework?

1 unit   

n.单位，单元，部件，元件，装置

参考例句：

• This unit is very hard.这个单元很难。
• This textbook has twenty units.这本课本有二十单元。