how long have you__ fpr them?A been waited B waiting C been waiti_英语解答

how long have you__ fpr them?A been waited B waiting C been waiting D wait 答案是选D,为什么?

人气：427 ℃　时间：2019-11-10 21:00:13

解答

C been waiting
现在完成进行时
你一直在这儿等他们多长时间了.