回复：随140报的推荐信若干封, 体检表等, 担保书等等, 你律师

since your I140 is LC based, 推荐信 is not needed.
you have all documents in your side, do 体检 at once.

For I140, need your company financial document.
then your boss's signature.
Talk to your company ASAP.

It can be as fast as one week, or slow as many months