The front road was washed away, so we _____ get off the bus and walk over.   [ ]

A. must        

B. had to      

C. should    

D. need

青蒿鳖甲汤除青蒿、鳖甲外，还有（）

A.生地、白芍、丹皮

B.熟地、知母、丹皮

C.熟地、白芍、丹皮

D.熟地、地骨皮、丹皮

E.生地、知母、丹皮