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3
first
second
third
在句中，序数词前一般要带定冠词the，但序数词前面有了物主代词如my,her, his等，就不能再用定冠词the.
This is a beautiful school.
Let’s go to school and do something in the school !
This is our teaching building.
first floor
second floor
teacher’s office
library
garden
Go to the garden.
Water the flowers.
teachers’ office
Go to the teachers’ office.
Say hello.
Hello! Miss White.
play
Go to the playground.
Play football.
ground
Go to the playground.
Play football.
playground
garden
library
teachers’ office
Look and say(看图，快速说单词）