Tú la última lámpara de la tienda. compraste compró compré compramos

It's compraste NOT compré. Compré would be the "yo" form. I'm fluent in spanish and have taken several Spanish course and it makes sense

Right compraste

Compraste is the conjugation of the ar regular verb comprar for the second person singular in the preterite tense. The preterite tense is one of two simple past tenses. It is used to describe actions that took place or were completed at a certain point in the past.  If you want to conjugate a regular verb in the preterite tense, you must remove the infinitive ending (in this case ar) and add the preterite ending that matches the subject. For the second person singular this ending is aste. So:

Tú compraste la última lámpara de la tienda.

1. subjuntivo2. indicativo3. subjuntivo4. subjuntivo5. indicativo6. c7. a

3. study 4.eat 5.play american football 6.write a card 7.practice piano 8.swim in the pool 9.paint a mural 10.listen to the band 11.dance at a party 12.drink milk 13.visit panama 14.open the card 15.prepare dinner 16.stay in the house 17.watch tv 18.write on the paper 19.study spanish 20.examine the paintings in the museum. i hope this : )