Đóng góp: Five little ducks went out one day,over the hill then far away.Mother duck said : "Quack Quack Quack Quack!" But only four little ducks came back.
Four little ducks went out one day,over the hill then far away.Mother duck said : "Quack Quack Quack Quack!" But only three little ducks came back.
Three little ducks went out one day,over the hill then far away.Mother duck said : "Quack Quack Quack Quack!" But only two little ducks came back.
Two little ducks went out one day,over the hill then far away.Mother duck said : "Quack Quack Quack Quack!" But only one little duck came back.