Do I need rturn the I 94 card when I enter Canada

What kind question did they ask when you use AP to come back to USA?Did you get a new I-94 card?Do I need apply the SIN card and open a bank account? 出入境各要花多少時間？我在多倫多住3天，如果多開點路去KingstonI81出口回美國，是否會人少一些。非常感謝您及時的幫忙。