Answer:
ellos <em><u>escriben</u></em>
El <em><u>es</u></em>
Mi hermano se <em><u>cepilla</u></em> los dientes/
1: Imperfect/ Preterite
2. Preterite/ preterite
3. all preterite
I hope this is ok, it makes sense to me, good luck !
