关于回肠的叙述，下列错误的是( )

A．是小肠的末段

B．管壁较薄，血液供应不如空肠丰富

C．黏膜上只有孤立淋巴滤泡

D．管腔口径比空肠小

E．位居腹腔的右下部

-How did you go home after the party last night?

-Well,there were no buses________we had to walk.[ ]

A．so as to  

B．in order to

C．so that  

D．in order that