某患者假日聚餐后右上腹部阵发性剧痛，向同侧肩背部放射，体位变化后有所缓解，以前也有过类似症状。血常规：RBC3.7×1012/L，Hb112g/L，WBC10.2×109/L，LCR72%，MCR8%，SCR20%。应高度怀疑

A．脾破裂

B．胆管结石、胆绞痛

C．阑尾炎穿孔

D．急性胰腺炎

E．胃穿孔

—Why was he late for school yesterday?

— He overslept. By the time he got to the bus stop, the bus ________ already ______.

A．has; left

B．had; left

C．was; leaving

D．have; left