Cómo se usa la palabra secuencia y el significado?

Question 6 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. yo pago answer for blank 1: question 7 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. yo mando answer for blank 1: question 8 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. miguel y ana llegan answer for blank 1: question 9 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. ustedes lavan answer for blank 1: question 10 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. tú lavas answer for blank 1:

Fill the blank with a la, a las, a los, or al. carlos no en el parque.

Is anyone able to ? i am so confused. this sheet is about irregular preterit verbs and direct object pronouns in spanish.