小学新标准英语三年级起点5B 20
时间：2018-12-29 作者：英语课 分类：新标准小学英语第五册（三年级起点）
英语课
[00:00.00] Unit 1 two
[00:04.05]What do you have to do?
[00:05.69]1.Look,listen and write the numbers of the pictures.
[00:16.56]How do you send an E-card?
[00:19.83]What do you have to do?
点击
收听单词发音 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。