低分化涎腺黏液表皮样癌与鳞状细胞癌的鉴别要点是（）

A.表皮样细胞

B.黏液细胞

C.中间细胞

D.鳞状化生

E.未分化细胞

If we ______ day before yesterday, we would have done the job.

A．hadn't been interrupted

B．weren't being interrupted

C．wouldn't be interrupted

D．weren't interrupted