I have been waiting for you for two hours.(对划线部分提问)----- ------have you been waiting for me?

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I have been waiting for you for two hours.(对划线部分提问)----- ------have you been waiting for me?
I have been waiting for you for two hours.(对划线部分提问)
----- ------have you been waiting for me?

I have been waiting for you for two hours.(对划线部分提问)----- ------have you been waiting for me?
为你解答.
(How long)have you been waiting for me?
你等了我多久?
解释:how long,多长时间,对一段时间提问.