-Oh,youarehere．I’mlookingforyouallthemorning．________?-Tothelibrary．A.Wh

-Oh, you are here．I’m looking for you all the morning．________?-To the library．A.Where have you goneB.Where will you goC.Where are you goingD.Where have you been?

D解析时态的考察句意为“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”。

这下我知道了