Ihavebeentothelibrarytoborrowsomebooks的提问!急!此题是补全对话:A:HELLO,dear!Ihavewaitedforyouforhalfanhour.________________B:Ihavebeentothelibrarytoborrowsomebooks.I'amsotiredandhungrynow.Iwanttoeatsometh

　　Ihavebeentothelibrarytoborrowsomebooks的提问!急!

　　此题是补全对话:

　　A:HELLO,dear!Ihavewaitedforyouforhalfanhour.________________

　　B:Ihavebeentothelibrarytoborrowsomebooks.I'amsotiredandhungrynow.Iwanttoeatsomething.

　　后面的我就不写了,请回答横上要填的,谢谢了!

　　我不知道用什么时态,...急,多给几个答案,为什么不能用Wheredidyougo?