<目的>
有幸收到SJSU CE的admission，我想保留然后继续等其他学校的结果。
<原因>
学校在AD中提到没在72小时内回复的话，之后发I-20文件可能要2个月
的工作天。目前也不确定其他学校的结果要等到何时(e.g.往年有看过
5月还有机会收到Ad)，怕到时还是选择了SJSU再发I-20会拖很久，所
以我想先通知学校发I-20文件给我。
<问题>
1.我这样做妥当吗？还是板友有更好的建议？
2.如果到时有更好的选择，除了发信通知学校外还需要将文件寄回
还去吗？
以下付上部分原文，希望有人能帮我解答。 :)
.............
Your admission letter and I-20 are ready to be sent to you. You have 72 hours
to order Express Mail. If you do not sign up for Express Mail and you live
outside the U.S., you may jeopardize your ability to gain a Visa interview in
time to attend SJSU.
.............
If you do not order Express Mail within 72 hours of receiving this message,
your admission packet, including your I-20, will be sent via regular overseas
mail which can take up to two months to reach you. You are not able to track
regular overseas mail. Please also note that we are not able to provide
additional copies of any material sent to you until 30 days has passed.