The case is rare a man can be cured of such a terrible disease.A. whenB. whereC. howD. th

问题补充：

The case is rare a man can be cured of such a terrible disease.

A. when

B. where

C. how

D. that

答案：

A. when

(答案→)B. where

C. how

D. that

解析：The case作先行词引导定语从句时，如果定从中缺状语，则从句通常由where引导。所以选B。