68页let'schant

　　Firstthesea,

　　Thenthesun,

　　Nexttheclouds,

　　Therainhasfun!

　　Firsttherain,

　　Andthenthesea,

　　Nextthesun,

　　Thentheclousoverme!

　　70页单词

　　rain雨

　　cloud云

　　sun太阳

　　stream小溪

　　vapour蒸汽

　　71页let'stalk

　　Wheredoestheraincomefrom?Itcomesfromtheclouds.

　　雨从哪里来?它来自云.

　　Wheredoesthecloudcomefrom?Itcomesfromthevapour.

　　云从哪里来?它来自蒸汽、

　　Wheredoesthevapourcomefrom?Itcomesfromthewaterintheriver.

　　蒸汽从哪里来?它来自河里的水.

　　Howcanthewaterbecomevapour?Thesunshinesandthewaterbecomesvapour.

　　水是怎样变成蒸汽的?阳光照耀后,水就变成了蒸汽.