请问on the second floor 与 at the second floor 有什么区别?

on the second on the second On the second是什么意思 on February the second 请问on the second floor 与 at the second floor 有什么区别? fill in the blanks with words in their proper form according to the hints.1.mary sits there _____ when mother is speaking to her.(quiet)2.when fatner gets up in the morning ,sandy ang sue are still_______(sleep)3.there is no toilet on the second floo on the second day 翻译 were you on the second take the second turning on the right at the traffic lights 请问 in the second day 还是on the second day? at the second floor 还是on the second floor Take the second turning on the left Mother's Day is (on the second Sunday in May).请问这句如何提问? he lives on the second floor.就second划线提问、 翻译:on the twtenty-second in June On Monday the second at 6 It's on the second floor. 对on the second floor 提问