Preparing me to my first quiz

Those days were very tired because I saw a new topic (but It's not than new to me) "Past simple" and "past continuos". I think that "past simple" is easy but "past continuos" is a little difficult to me. In first time  I didn't know where I must put "past simple" or "past continuos" but my teacher explained how are the diference... "past simple" is used to say some short action... when is "past continuos" is used to say an longer action. Even I need practice "past continuos". I'll search more information to identify better both "past".
Also the next week I'll do my first quiz, so I have to study all the topics that I saw this month. I hope that the quiz will be easy. Obviously if I'll study.