Answer: Today is a true-false test.
Explanation:
We know that the conclusion is the final statement on the basis the given statements or premises. 
The given statements are : 
- A teacher gave all her classes a true-false test on seven consecutive Mondays.
 - Today is Monday.
 
If we assume that today is one of the seven consecutive Monday then the conclusion on the basis of the above statements will be :-
"Today is a true false test".