B does not belong with the rest of them. All of them are talking about time except B
1.) andabamos
2.) cuidaba
3.) mirava
4.) lei
5.)pasaron
6.)practicaban
7.)jugaban
8.)estudie
it is absolutely correct.
1) está
2)es
3)es
4)está
5)son
6)Son
7)está
8)está
9)es
10)es