介绍:
st st st stand stand stand
st and stand
st ep step
st op stop
st ick stick
Step，step，step！
Stop，stop，stop！
1 step，2steps，stop！
sw sw sw swim swim swim
sw im swim
sw ing swing
sw ell swell
Swing on the swings！
Slide on the slides！
What a happy sights！
大家还在听
