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保护环境
What are the pupils doing ?
They're picking up
useful things.
Please read silently
(默读) and underline the words or sentences which you don't understand.
（在不理解的词、句下面划线）
Please solve your problems with your parteners.
(和你的组员一起解决难题）
Part1
drop
[?]
Part1
drop
paper
[e?]
[?]
—
—
drop bottles
recycle
useless？
useful
You shouldn’t
They are
throw them away.
useful things.
Part2
They are picking up bottles.
They are putting the bottles into a bag.