Question

-Oh, you are here．I’m looking for you all the morning．________?

-To the library．

1. A.
   Where have you gone
2. B.
   Where will you go
3. C.
   Where are you going
4. D.
   Where have you been?

Answer 1

D
时态的考察句意为“你在这里。我找了你一上午。”根据答语“我去了图书馆”，可知现在不在图书馆。所以应用现在完成时，have gone to “去了” have been to“去过”。