> A2 exercises: 1, 2, 3
> A2-B1 exercises - past perfect vs. past simple: 1
> B1-B2 exercises - past perfect simple vs. past simple & continuous: 1
> More exercises
> B2 exercises - past perfect simple vs. continuous: 1, 2
> B1-B2 exercises - past perfect simple & continuous vs. past simple & continuous: 1
