You didn't wait for Mr Black last night, did you?

Youdidn'twaitforMrBlacklastnight,didyou?No,butwe______.Hedidn'treturnhomeatall.Acould... You didn't wait for Mr Black last night, did you?
No, but we ______ . He didn't return home at all.
A couldn't have B needn't have
C didn't need to D should wait have
这道题答案为什么选B, 而怎样排除A, C ,D
请详细解释一下,谢谢。
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2014-10-03 · TA获得超过443个赞
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感觉是B 要理由真给不出哦
没回家就不等了呀 c我总感觉怪怪的哦 语气还是b符合哦
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