--You know Miss Li has been in hospital for days?

当然是选B啊,any better是一个词组,意思是“好一些”.
---You know Miss Li has been in hospital for days?
---Yes.I wonder if she is any better now.
全句的意思是---你知道李小姐住院好些天了吗?
---是的,我想知道她现在是否好些了.