---What a long queue!

--- Yeah．We ________________ up in the past few hours for tickets back home．

A．queued

B．have queued

C．are queuing

D．have been queuing

细菌性痢疾肠道病变最显著的部位是在 ( )。

A．升结肠

B．横结肠

C．降结肠

D．乙状结肠

E．乙状结肠和直肠