—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
网友回答
(答案→)A. had he been
B. has he been
C. had he gone
D. has he gone
解析：e 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。