33．Not until he called the secretary three times ______ that the manager went to an important meeting．

A．did he tell

B．he told

C．was he told

D．he was told

涎腺黏液表皮样癌的细胞成分为（）

A.黏液细胞、表皮样细胞和未分化细胞

B.表皮样细胞、中间细胞和未分化细胞

C.黏液细胞和表皮样细胞

D.黏液细胞、表皮样细胞和中间细胞

E.表皮样细胞和中间细胞