Share Ex3: Complete the sentences with at, in, on.
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Her classroom is ................the third floor of that building.
on
When I’m at school, my parents are ............... work.
at
Look! The students are playing football .................... the classroom.
in
My little sister usually has lunch .................school.
at
The most beautiful posters are ..............the wall in the staffroom
on
Many students are watering ....................the school garden.
in
