以下关于牙本质牙骨质界的说法错误的是（）

A.距离根尖孔约0.5～1.0mm

B.是根管最狭窄处

C.是牙髓与牙周组织的分界

D.在老年患牙中此处距根尖孔小于0.5mm

E.根管预备应止于此处

He likes to play ______ violin and I listen to _______ music.

A．the, the

B．/, the

C．the, /

D． / , /