Question

---Where does John live?
---He lives on ______ floor but he doesn’t use a lift to go up and down.

A．nine

B．the ninth

C．the nineth

D．a ninth

Answer 1

B

考查序数词。句意：他住在第九层楼，但是他不用电梯上上下下。英语中表示在几楼用序数词表示，选项C结构有误，故选B。