I noticed that my grandmother was very upset when I told her about the accident,so I wished I　　it to her.

A．did not mention

B．have not mentioned

C．do not mention

D．had not mentioned

供应直肠、肛管的动脉中，最重要的（）

A.骶中动脉

B.直肠上动脉

C.直肠下动脉

D.肛管动脉

E.阴部内动脉