Question

—Tom came backhome the day before yesterday.

—Really? Where________ at all?

1. A.
   had hebeen
2. B.
   has hebeen
3. C.
   had hegone
4. D.
   has hegone

Answer 1

A
前句用的是一般过去时，后句提问的是在came back之前发生的动作，故应用过去完成时。