I have __________ written my composition, but she hasn’t __________.

A．yet, already

B．ever, never

C．already, yet

D．already, still

术后出现腭瘘的原因，最常见的是

A．手术时间过长
B．黏骨膜瓣松弛不够，缝合时张力过大
C．手术未给大剂量抗生素
D．病儿年龄过小
E．术后拆线时间过晚