回複：可以要求recapture這一個月

You can apply for H-1B extension for one month to recapture the H-1B time unused when you were physically outside the U.S.

H-1b recapture applicants have the burden of proof. As a result, the applicant may submit I-94, passport stamps, boarding passes, flight or hotel reservation records or invoices, travel schedules if using a travel agent, and etc.