)staircase是on the staircase还是in the staircase还是at the staircase?
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![)staircase是on the staircase还是in the staircase还是at the staircase?](/uploads/image/z/11852513-17-3.jpg?t=%EF%BC%89%26%238203%3Bstaircase%E6%98%AFon+the+staircase%E8%BF%98%E6%98%AFin+the+staircase%E8%BF%98%E6%98%AFat+the+staircase%3F)
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)staircase是on the staircase还是in the staircase还是at the staircase?
)staircase是on the staircase还是in the staircase还是at the staircase?
)staircase是on the staircase还是in the staircase还是at the staircase?
in指在什么里面,或者指在某个大地方,如I‘m in Hainan,at Haikou
at指在一个小地方.
on指贴着表面的在.上面.
所以这里用ON