----- Where did you ______ our chemistry teacher?

----- It was in the supermarket ______ I saw him.

A．come to, where

B．come across, that

C．come across, where

D．come to, that

女性，65岁，腹胀痛，腹泻便秘交替月余伴里急后重感，无鲜血便。体格检查：腹平软，未及包块，左锁骨上，腹股沟淋巴结未触及

病理结果提示肿瘤累及肠壁肌层但未穿透浆膜，应属Dukes（我国补充分类）（）

A.A

B.A₂

C.B

D.C₁

E.C₂