---Mum , I think I’m _______ to go back to school .  

--- But the doctor says you must stay in bed for two more days .

A．enough well

B．well enough

C．enough good

D．good enough

银行按照买方或业主的申请，向卖方或承包方所出具的一种旨在保证货款支付或承包工程进度款支付的保证承诺是指( )。

A．收款保函

B．付款保函

C．履约保函

D．预付款保函