大病瘥后喜唾久不了了，胸上有寒，当以丸药温之，宜

A．小建中汤

B．理中丸

C．吴茱萸汤

D．小半夏汤

No one told us         . We need your help.        [ ]

A. how to do it        

B.what to do it

C. how should we do    

D. what should we do