How I wish I _____ the army then. I would have become a soldier.

A．attended

B．had attended

C．would have attended

D．have attended

箭头所指的解剖结构是（）

A.肠系膜上静脉

B.脾静脉

C.下腔静脉

D.胰十二指肠上静脉

E.十二指肠