Hola necesito ayuda para desarrollar esta actividad•Write the correct tense past perfect, or past simple :0?

Hola necesito ayuda para desarrollar esta actividad • Write the correct tense past perfect, or past simple : 0. We had already eaten (already, eat) when John came (come) home. 1. I (feel) _______________ a little better after I (take) _________________ the medicine. 2. I was late. The teacher (give) _________________ a quiz when I (get) ________________ to class. 3. It was raining hard, but by the time class (be) ____________________ over, the rain (stop) ________________________. 4. Dinosaurs (become) ______________________ extinct by the time humankind first (appear) _____________________________ 5. I (see never) ___________________ any of Picasso´s paintings before I (visit) _____________________ the art museum.