学习指导：跟着说英语，别说汉语，跟着做动作，直到可以闭着眼睛听着会做动作，以后就不要再看了。
温情提示：高年级可以直接从第二次课开始上。
Lesson twenty
Five Little Kittens
Five little kittens playing by the door.
One chased a mouse and then there were four.
Four little kittens playing by the tree.
One chased a puppy and then there were there.
There little kittens said mew mew mew.
One chased a bunny and then there were two.
Two little kittens having lots of fun.
One chased a butterfly and then there was one.
One little kitten resting in the sun.
He chased his tail and then there was none.
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