Every country has its own culture.
Even though each country uses doors, doors may have_ 21 __functions and purposes which lead to ___22__ differences.
When I first came to America, I noticed that a public building had two different__23___ and they had distinct functions. You have to push the door with the word “PUSH” to go out of the building and to pull the door with the word “PULL” to_ 24____the building. This was new to me, because we use the ____25__ door in South Korea. For quite a few times I failed to go out of a shopping centre and was embarrassed.