问题描述：
一道令我费解的英语选择题
The days__you could travel without a passport are gone.
A of which B at which
我感觉应该选A啊 但答案为啥是B呢
The days__you could travel without a passport are gone.
A of which B at which
我感觉应该选A啊 但答案为啥是B呢
问题解答：
我来补答展开全文阅读