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

  A. when        B. where                C. how              D. that

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

1. A.
   when
2. B.
   where
3. C.
   how
4. D.
   that

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

    A．when B．where    C．how  D．that

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

  A. when              B. where            C. how                 D. that

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