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难道是选择：Yes, I want to extend my current immigration status in the U.S.吗？
-No.

Do you want to extend your immigration status?

Yes, I want to extend my current immigration status in the U.S.

No, I want to change my status to a different immigration status.
-Yes. From B-1 to F-1, so this is the correct choice. By the way, you need to talk to the school International Student office, and ask them to do this paperwork for you. Don't do it by yourself!

No, I want to reinstate my status.