Answer:
1. Yo (abrí) un regalo de mi prima.
2. Yo (limpie) la casa cuando mi prima me llamó.
3. Yo (corrí) cuando empezó a llover.
4. Yo (trabajé) en la tienda cuando vi a mi amiga.
5. Después de hacer la tarea, yo (llame) a mi prima.
6. Al final del día, yo (leí) por media hora antes de acostarme.
Hope this helps!
looks like number 2 or 3 are wrong but id ont know
let me know
if its only a few sentences you want he is sending a letter to ms luis about his exchange program, his work at an animal shelter, and his improved spanish