The first paragraph tells us about ______. A. the type of visa a visitor to the USA should get B. The kind of visitor one can be C. the certificates a visitor to the USA should prepare D. the length of time a visitor to the USA can stay
A small white form, 1-94, will be attached to your passport showing your classification (类别), arrival date, purpose of visit, and departure date. If you want to stay longer than the date on this form, you must apply to the United States Immigration Service (移民局) for an "Extension of Stay" at least one month before the date indicated. Be sure not to stay beyond the date on which you should leave without an approved extension.