43 人教版三年级英语下册Unit 6-7视频网课，给大家补上

人教版三年级英语下册Unit 6-7视频网课 .How many+可数名字复数(pens, toys, books…)+do you have? I/ We have+数字(twelve, fourteen, fifteen…). 例子： How many pens do you have? 你有多少支钢笔？ I have five.