seventeen, eighteen, nineteen, twenty,外研版新标准英语四年级上册,Numbers,unit 1,eleven,twelve,thirteen,fourteen,fifteen,5+6,4+8,2+11,7+7,3+12,8+8=,16,sixteen,10+7=,17,seventeen,9+9=,18,eighteen,9+10=,19,nineteen,15+5=,20,twenty,eleven twelvethirteen fourteenfifteen sixteenseventeen eighteennineteen twenty,a dog,How many do you have?,dogs,How many dogs do you have?,I have,twenty.,a cat,How many do you have?,cats,I have,seventeen.,How many do you have?,flowers,I have,nineteen.,sixteen,seventeen,eighteen,nineteen,twenty,See you!,
