For the first sentence, you don't need to include "Today" and "this morning", as they both contain the same information (that we are talking about what happened TODAY). The same thing for "this morning" and "a.m." - you should only use one of them, as they both contain the information that we are talking about the morning. There are several correct ways of saying it, as you can see in the correction. :) Also, we always put a space after commas, full stops, exclamation marks, etc. Other than that, great job! :)