The driver might have had an accident but that he           the car suddenly .

A．braked

B．would brake

C．had braked

D．should have braked

分泌性中耳炎患者，经多次鼓膜穿刺抽液及注射治疗，鼓室积液仍出现，宜选择进行（）

A.鼓膜切开术及鼓膜置管术

B.咽鼓管吹张术

C.外耳道填塞

D.用波氏球行外耳道逆吹张术

E.鼻腔滴药