exciteing

relaxing

bore

worrying

pleased

P47

一：Liquidsolidgas

↙↘↙↘↙↘

rainwatericehailwatervaporfog

二：

Theearth

Theuniverse

P48

shadowcanchangeaccordingtothesun.

Inthemorningandatnightfall,itislong.

Inthemiddleoftheday,itisshortanddack.

Howinterestingmyshadowis.

P44

1.Wateristhesurceoflife,withoutfood,wecanliveforseveralw eeks,butthere'snowater,weafewdayslaterwoulddiedehdration.We bodymorethantwothirdsofthepartiswater.

2.Don'tstayqpen,andlefttoturnoffthetap.Washyourhandswith watertoboilsmallpoints.Faceandbrushyourteethtoavoidusingwas hbasinandcaps.