—Alan, it’s late. Why not go to bed?

— Jenny hasn’t come back yet. I _______ for her.

A．waited

B．have waited

C．am waiting

D．was waiting

男性，34岁，农民，持续发热14天，伴腹泻8天，大便4～5次/天，4小时前突起右下腹剧痛，随后感心慌、出汗、呕吐、腹胀。查体：下腹广泛压痛，以右下腹明显，有肌紧张及反跳痛，肠鸣音消失。血象：WBC19.6×10 9/L

A．阿米巴痢疾并肠穿孔

B．血吸虫病性急性阑尾炎

C．结肠肿瘤穿孔

D．伤寒并发肠穿孔

E．肠结核并结核性腹膜炎