—How clean the window is !                

—Yes.It      just now.    [ ]

A. has been cleaned    

B. was cleaned  

C. is cleaned    

D. willbe cleaned

30岁不孕妇女发现右卵巢肿物3月，B超证实右附件区肿物7cm×5cm，包膜完整，散在细点状回声伴部分强回声。医生建议手术切除是鉴于哪种不良预后

A．蒂扭转

B．肿瘤破裂

C．有恶变可能

D．治疗不孕症

E．肿瘤较小，宜行摘除手术保留卵巢