What letter means waiting for a long time?

what letter means waiting for a long time 苏教版初一英语寒假作业p66最后一大 i waiting for you a long time what a long time we've been waiting,___? she kept me waiting for a long time last night 求一首英文歌 i been waiting for a long time .. she kept him waiting for a long time同义句 讲讲keep sb.waiting for a long time的语法 We have been waiting a long time.不用for a long time After a long time of waiting,I received the letter from my g I stood there waiting a long time for the bus 为什么用waiting Heiio stranger.I have been waiting for you for a long time.A I am waiting for a person to accompany me for a long time