art room前应加IN还是AT还是ON呀?急

art room前应加IN还是AT还是ON呀?急 At the moment she painting in the art room正确还是At the moment she paint in the art room正确 on the room,还是at the room “art room” 前面是用“a”还是“an”? 在宾馆的几房间用英语怎么说是用at 还是 in如：at room 123 in room 123 at 123 room 哪一个 Should art education take place in school or at home?这句话重点在哪里?它强调的是“应不应该进行art education”,还是“应该在家还是在学校进行art education”? “在房间里”英语介词用in 还是 at?in the room at the room 哪个?小地方不是用at are there_____ else in the room at that momentare there______ else in the room at that moment空格应该填anyone 还是someone? I like art best at school的同义句是什么是I like art very much at school还是I like art at school very much Where is the art room?It‘s（ ）the second floor.（选序号） A.at B.in C.on 英语翻译用on还是in还是at in 还是on还是 at tomorrow at restaurant还是in restaurant? at place还是in place? at summer 还是IN SUMMER in 还是at rush hour at class还是in class at class 还是 in class