一道关于havebeenin和havebeento用法的初二英语填空题.
-Where____you_____?
-I________theschoollibrary.
答案是这样的:-Wherehaveyoubeen?-Ihavebeenintheschoollibrary.
可我这么写的:-Ihavebeentotheschoollibrary.
我记得老师说过havebeenin是在某个地方呆了一段时间,可这里题目没有说明呆了多久啊?为何还用havebeenin?而不用havebeento?