《金匮要略》论肺痿重亡津液的原因有（）

A.发汗过多

B.呕吐频繁

C.消渴，小便利数

D.用药过燥

E.便难，又被快药下利

I walked slowly through the market, where people _____ all kinds of fruits and vegetables. I studied the prices

carefully and bought what I needed.[ ]

A. sell

B. were selling

C. had sold

D. have sold