What is a open loop system​

Question 11 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. tú estudias answer for blank 1: question 12 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. raúl estudia answer for blank 1: question 13 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. nosotros pagamos answer for blank 1: question 14 (fill-in-the-blank worth 1 points) fill the blank with the preterite tense of the verb in parentheses. usted a la tienda por teléfono. (llamar) answer for blank 1: question 15 (fill-in-the-blank worth 1 points) fill the blank with the preterite tense of the verb in parentheses. lolita pablo en la fiesta anoche. (hablar) answer for blank 1:

Hola, susana. pablo. ¿qué tal? answer for blank 1:

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