2º ESO Past Simple or Past Continuous?

HI, Guys!!!, 

Do you already know when you have to write Past Simple or Past Continuous? What is the completed action? What is the action in progress? Well, let's see the following pictures and then, you can click on the following links to do some exercises!  ;-)

1. Past Simple and Past Cont. (exercises + answer key)

2.grammarbank (Past S. vs. Past Cont. + answer key)

3. grammarbank (Past S. vs. Past Cont.) (2)

4. aulafacil.com (past-simple-vs-past-continuous)

5. High Score (Past S. vs. Past Cont. )