狼的顽强的生命是靠与______的公马、______的猎狗、凶残的外来狼群和凶猛的猎人生死搏斗而存活下来的。 填入横线部分最恰当的一项是( )。

A．凶狠 凶悍

B．凶悍 凶残

C．凶狠 凶残

D．凶残 凶悍

If the expiry date or presentation period falls on a day when the bank is closed，then it should be extended to the first following day on which such bank is open．( )