题目内容：
Which floor is her apartment located on?
A．It' s on the ground floor． B．It' s on the second floor．
C．It' s on the third floor．
D．It' s on the fourth floor．
参考答案：
答案解析：
单选题：Which floor is her apartment located on?
- 题目分类：公共英语三级
- 题目类型：单选题
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B．It' s on the second floor．
C．It' s on the third floor．
D．It' s on the fourth floor．