please help. thanks

我的opt was from 1/2005 to 12/2005, H1 strted from 9/27/2005.

My work experience:

1.1/2005-9/30/2005, full time work for Company A by OPT.

2.6/1/2005-8/31/2005, part time work for Company B by OPT.

3.9/27/2005-present, I switched to work for Company C by H1.

I have w-2's from those 3 companies.

My question：

1. for 1＆2, 有一時間交叉（我1/2005-9/30/2005用opt在為公司A作full time工作.同時 from 6/2005-8/2005, 我同時也為另一家公司B作part time.）。 when filing Form 485, 雖然我有w-2,我能不能把６／２００５－８／３０／２００５ 這段partime job的經曆隱去？因為我覺得uscia肯定會給我RFE about that. I do not like that.

2. 作背景調查時，要查w-2嗎？