—Tom came back home the day before yesterday.
— Really? Where __________ at all?
A．had he beenB．has he been
C．had he goneD．has he gone
A
come back是過去，而問句中的動作發(fā)生在came back之前，是過去的過去，所以要用過去完成時，而且Tom已經(jīng)回來，所以要用been，而gone是去了還未回來。
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