当然可以先不交体检。将来要的时候再提供。
好处就是可以省下体检费用(毕竟不能走保险,不过有的雇主会愿意报销)。
You are NOT required to submit Form I-693 at the time you file your
adjustment application, but may do so if you wish. Because of the time-
limited validity of Form I-693, you may choose to submit your Form I-693
after you file your Form I-485. You may also submit Form I-693 in person at
an interview in a USCIS field office, if an interview is required. By
waiting to submit Form I-693, you may avoid having to repeat the immigration
medical examination.
坏处是可能会浪费时间,错过一些绿的机会(虽然很小)……