— I'm sorry to keep

I'm sorry to keep you waiting. I'm sorry to keep.为什么keep前面加to I'm sorry to keep you waiting so long -i'm sorry to keep you waiting -______ I'm sorry to keep you_______(wait)so long — I'm sorry to keep you waiting.— Oh,not at all.I here for o I hate to not participate in your past I'm sorry to keep you i`m sorry to keep you_____.you know,i`ve_____for about two h .I'm sorry to keep you ___ for a long time.A.to wait B.waiti 选择题--I'm sorry to keep you waiting so long?--- 选哪个正确A.Don't I'm sorry to keep you_______(wait) for em for a long time. I'm sorry to keep you waiting.这是一句什么句式的句子 主谓宾?还是什么