-- Look at that girl. Is it Susan?

--No, it _______ be her. She has gone back to her home town .

A．can't

B．mustn't

C．needn't

D．may not.

影响卵巢癌预后的主要因素是哪些()

A．年龄

B．分期

C．残存肿瘤

D．病人一般状态

E．肿瘤的化疗效果