> A1-A2 exercises - can: 1, 2, 3, 4, 5, 6, 7, 8, 9
> A1-A2 exercises - could: 1, 2, 3, 4, 5, 6, 7
> B1-B2 exercieses: 1, 2
> More exercises
> A1 exercises: 1, 2, 3, 4
> B2 exercises: 1
> A1 exercises - must: 1, 2
> A1 exercises - have to: 1 , 2
> A2 exercises - have to & must: 1, 2
> A2 exercises - should & must: 1, 2
> A1-A2 exercises: 1, 2, 3
> B1-B2 exercises: 1, 2, 3, 4, 5, 6
> C1 exercises: 1