回複：回複：If no case this year in my district (there is only one I-4

why not ? unless you don't care about more waiting.

see recent data from FBI:

"Nearly 320,000 people were waiting for their name checks to be completed as of Aug. 7, 2007, including more than 152,000 who had been waiting for more than six months, according to the U.S. Bureau of Citizenship and Immigration Services. More than 61,000 had been waiting for more than two years"

unless there is serious change for the Name check procedure, the pool is growing everyday, and no one can predict how long you need to wait.