介绍:
Key words to learn：
post office， mail (noun&verb)，fire station，sirens，put the fire out， keep safe，
Sentences:
1.This is my town. This is where I live.
2.This is our fire station. The fire truck lives here. Oo! Ee! Oo! go the sirens.
3.When there is a fire,the fireman go to it. They put the fire out.
4.This is our police station. Police officers work here. They keep our town safe.
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