—Tony, come down and help me with the heavy box!  

—Come on! I _____ all day long. Get Peter to do that!   [ ]

A. work    

B. had been working    

C. had worked    

D. have been working

关于肺浸润性黏液腺癌，叙述正确的有（）。

A.具有腺样分化

B.有黏液产生

C.TTF-1阳性

D.CDX2阳性

E.CK7阳性