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Q: What should we do to protect the Earth?
(A)Save water
(B)Save energy
(C)Save trees
(E)Don’t use too much plastic
We should (not)…
能源
塑料
(D)Don’t throw rubbish
（快速浏览课文的小标题，选出保护地球的几个方面）
(F)Grow more trees
We shouldn’t
Water is useful.
Save water
We drink water and use water to clean things every day.
In many places, there is not much water.
We should not waste water.
We should reuse and save it.
Scanning
读第一段
What do we use water to do?
We use water to_____________.
…
Water is _________.
（有用的）
waste浪费
save节约
reuse
…to
水枪大战