To my mind, they should be like these... 1. That's the last image/picture I have of him. At least it's a nice one and not one where he was sick. The words "image" and "picture" are somewhat wrong here, I would use "photo" instead. 2. There is a part missing to/ in/of the sentence. "in" is correct. 3.There is a chance that there could be/is some mail