By the way,

来源: 于 2015-05-22 06:15:06 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

you had better bring your B-2 approval notice or the B-2 application receipt (if the B-2 is not approved before you leave) for the F-1 visa application, in case the VO ask you to prove your legal stay in US.