the window <in><of> the room

urajiosutokku

New Member
Japanese
Hello,
Which preposition is fine, in or of?

Situation.
A boy is in a hospital. There are some sick people in a room. He visits someone in a hospital.
He is opening the window. A nurse sees and says
"Don't open the window ( in / of ) this room!

Which is good one, or both are fine ?
 
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