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河
空气
The river is clean.
The air is clean.
The street is clean.
City A
Let’s talk
dirty
/ ?: /
肮脏的
_________ is dirty.
City B
肮脏的环境使我们心
情变差,给我们带来
的甚至是疾病与死亡。
Keep our city clean
This dialogue tells us _______.
What makes our city dirty?
B. How to keep our school clean.
C. How to plant trees.
D. What can we do to keep our city
clean.
What makes our city dirty?
D. What can we do to keep our city
clean.
Let’s watch
plant /a:/
种植
_____makes our city dirty ?
Tip：