―I’ m sorry to have kept you waiting .―Never mind.I ( )(be)

―I’ m sorry to have kept you waiting .―Never mind.I ( )(be) I'm sorry to have kept you waiting long. -----Never mind. I i'm sorry to have kept you waiting long.never mind.I（ ）here --i am sorry to have kept you waiting long ---never mind .i 分析语法 i'm sorry to have kept you waiting. I'm sorry to have kept you waiting. I’m sorry to have kept you waiting. ——i'm sorry to have kept you waiting. I'm sorry to have kept you waiting so long. I'm sorry to have kept you waiting so long 和i' m sorry to ke I'm sorry to have kept you waiting .-- Oh .not at all .I ___ -I'm sorry to have kept you waiting .I'll make shorter work