—I am sorry but I must be going off now.—OK( ) A.So long B.W

It's too late.I must be off now.-OK.______ A Go slowly B Sta It is getting late.I am afraid I must be going now!OK,______ I am afarid I must be off now. I am sorry you have been waiting so long .BUT --I am going to the school party.--________ A.So am I B.so w I’m sorry I am late,sir.— It doesn’t matter,but be a little I am so sorry But I love Do you have to leave now?--Sorry,but I really _____.A.must B --It‘s getting late.I'm afraid I must be going now.--OK.____ -It's geting late.I'm afraid I must be going now. -Ok.______ “I really must be off now? I am afraid I must be going