Mr.Smith,       of the        speed,started to read a novel.

A．tired, boring

B．tiring, bored

C．tired, bored

D．tiring,boring

阵发性腹痛常见于

A．溃疡病穿孔

B．肠绞窄

C．机械性肠梗阻

D．急性阑尾炎

E．脾破裂出血