回複：請教單身老貓：CPT可以在拿了degree diploma但I-20還沒expire前嗎？

老貓不是做移民事務的專業,但是Optional Practical Training (OPT) 的基本要求並沒有規定您一定需要畢業之後才能申請,基本上USCIS的規定是包括下麵三項
OPT Eligibility

must be in full time student status for at least one full academic year preceding the submission of your OPT application
be maintaining valid F-1 status at the time of the application, and
intend to work in a position directly related to your major field of study.
所以依據上述的規定您應該可以申請部份的OPT,詳細的資料如下
When to apply

If you are a student completing the first academic year of study (or are in a one year program), the earliest you can submit the application is 90 days prior to the date you complete your first academic year.
If you are beyond the first year of study, we recommend you submit your application no earlier than 120 days prior to the start date you request for your OPT.
If you are applying for OPT based on completion of all coursework and/or completion of your academic program, you must submit an application for optional practical training prior to your completion date. Applications received at USCIS after the completion date will be denied.
Applications will be accepted by OISS at your pre-scheduled OPT appointment (see below)
Dates of OPT Authorization. The OPT card is approved for a specific beginning and end date. You must identify those dates on the OPT Request Form. For OPT after completion of studies or graduation, the beginning date can be no later than 60 days after the date you complete your studies. If you have questions about your OPT dates, please discuss this with an OISS adviser.

您應該與您在下的外籍學生顧問或是當地USCIS的辦公室查詢更進一步的資料