Question

—Tom came back home the day before yesterday.

— Really? Where __________ at all?

A. had he been　　　　　　　　　　 　　　　　 B. has he been

C. had he gone　　　　　　　　　　　 　　　　 D. has he gone

Answer 1

A come back是过去，而问句中的动作发生在came back之前，是过去的过去，所以要用过去完成时，而且Tom已经回来，所以要用been，而gone是去了还未回来。