i'm learn something new by doing 1.1 exercise in less than 1 hour. i learn the difference between "in, on, at".
in is getting used to explain where is the nouns. example: Rani is in the tunnel.
on is getting used to explain where is the nouns specifically also explain about time. example: Rani is on the ground,, Rani work on monday
at is getting used to explain where is the nouns specifically, like bus station or other public space, also explain time. example: Rani work at night,, Rani wait for her bus at the bus station