个人微信：309629439
公众微信号：Estefania369
喜马拉雅：英美混音的Estefania

Word list

thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty

31'

twenty twenty-one

12'

课文

lesson 1

85'

lesson 2

71'

10 ＋ 11 = 21
ten and eleven is twenty-one
+ 可以用“and"表示