----“Have you ever been to HK, Jim?”

----- “ Yes ,  I ______ there for two weeks with my parents last summer.”

A．have gone

B．went

C．have been

D．was

男性，38岁，突然腹痛、腹胀、停止排便排气，伴有呕吐，呕吐物为血性液体，可能的诊断为()。

A．急性阑尾炎

B．胆道蛔虫症

C．输尿管结石

D．绞窄性肠梗阻

E．单纯性机械性肠梗阻