在对疾病"胆脂瘤型中耳炎"编码时，主导词应为（）。

A.中耳

B.炎症

C.感染

D.中耳炎

E.胆脂瘤

After the war, a new school building was put up  ________ there had once been a theatre.

A．that

B．where

C．which

D．when