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The Earth is being destroyed.
Protect the Earth
Protect the Earth
Unit 7
Save(节约 )water
Save energy
Save trees
Don't use too much plastic.
______ comes from trees.
听录音，说出四段文本标题各是什么？
能源
Energy comes from ____ and _____.
Wood
coal
oil
coal
煤
oil
油
Save water
Save energy
Save trees
Don't use
too much plastic
1
2
3
4
Save water
Read and talk 读课文讨论下列问题