<目的>
有幸收到SJSU CE的admission，我想保留然後繼續等其他學校的結果。
<原因>
學校在AD中提到沒在72小時內回覆的話，之後發I-20文件可能要2個月
的工作天。目前也不確定其他學校的結果要等到何時(e.g.往年有看過
5月還有機會收到Ad)，怕到時還是選擇了SJSU再發I-20會拖很久，所
以我想先通知學校發I-20文件給我。
<問題>
1.我這樣做妥當嗎？還是板友有更好的建議？
2.如果到時有更好的選擇，除了發信通知學校外還需要將文件寄回
還去嗎？
以下付上部分原文，希望有人能幫我解答。 :)
.............
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.