1)Follow zhu-z-zhu's suggestion, tell company A we will go.
2)Follow President Hu's advise, play the card in hand. (Not necessarily tell the date of Wednesday.)
Johnny,
Since I had several interviews on parallel, I think it would be fair to keep you updated on my situation. I received a job offer this morning, and I have to make a decision of accepting it or not within the required days. However, I really like the corporate culture in your company, and I like the position in your place, which is better for my career path.... it'd would be great if you would let me know the possibility of your making a quick decision, so I don't have to struggle...
现在你手上有牌，不妨打一下，看看反应。
