-Did your mother sleep well last night?

-She ________ have slept through all those noises.[ ]

A．mustn't  

B．may not

C．can't  

D．won't

超声显示子宫腔内双层蜕膜囊(双蜕膜征)，有力提示

A．异位妊娠
B．宫内妊娠
C．卵黄囊
D．流产
E．胎儿死亡