I haven't seen M r White for days.can you tell me where he has been?怎么不说where he has gone?

I haven't seen M r White for days.can you tell me where he has been?怎么不说where he has gone?
I haven't seen M r White for days.can you tell me where he has been?怎么不说where he has gone?

I haven't seen M r White for days.can you tell me where he has been?怎么不说where he has gone?
where he has been表示他在哪呆了（人有可能回来,也有可能还在那）
where he has gone表示他去哪了（人未回）
意思应该是不同的.因说话的人不能确定谈论对象的所处位置,因此不能用gone.而been本身不需计较位置,更通用,更适合.

where he has gone是他现在回来了，过去去哪儿了。而where he has been?是他现在不一定回来了，问他过去去哪儿了。

用where he has been应该与上一句中的for days有关。表示“这些日子他一直在哪儿”，表示“状态”。如果用where he has gone多表示点时间的事情，比如看到某人不在办公室，就可以说“where has he gone?” 。但有了一段时间的前提，最好用where he has been。

lianxiang531说得对，题中为了诱导答题者，特地写出了“for days”那句，这样表示状态的“been”就顺理成章了。