Cách sử dụng
The expression "of all the..." is used when you are surprised or disappointed with something or someone among all the others. For example, if you say "Of all the cakes I've tried, this one is the best" it means that you have tried many cakes but this one is the best. Or if you say "Of all the people I thought would forget my birthday, you were the last one I expected" it means that you thought many people would forget but this person surprised you by also forgetting.